Tokina AT-X Pro AF 20-35mm F/2.8

Wide-angle zoom lens • Film era • Discontinued

Announced:
· 1998
Production status:
● Discontinued
Country of design:
· Japan
Original name:
· Tokina AT-X PRO 20-35mm 1:2.8
Class:
· Fast full-frame wide-angle zoom lens
· Professional model

Abbreviations

AT-X	Professional lens with high quality optics and robust build. Meets the highest standards and provides excellent performance and flawless image quality unachievable with traditional optical technologies.
PRO	The lens is equipped with Focus Clutch Mechanism for switching the lens between autofocus and manual focus modes.

Specification

Optical design:
Maximum format:	35mm full frame
Focal length range:	20mm - 35mm [1.8X zoom ratio]
Speed range:	F/2.8 across the focal length range
Lens construction:	15 elements in 11 groups
	2 ASPH
	Internal focusing (IF)
Mount and Flange focal distance:	Canon EF [44mm]
	Minolta/Sony A [44.5mm]
	Nikon F [46.5mm]
	Pentax K [45.5mm]
Diagonal angle of view:	94.5° @ 20mm - 63.4° @ 35mm (35mm full frame)
On Canon EOS APS-C [1.59x] cameras:
35mm equivalent focal length range:	31.8mm - 55.7mm (in terms of field of view)
35mm equivalent speed range:	F/4.5 (in terms of depth of field)
Diagonal angle of view:	68.4° @ 20mm - 42.5° @ 35mm
On Sony DSLR-A/SLT-A APS-C [1.53x] cameras:
35mm equivalent focal length range:	30.6mm - 53.6mm (in terms of field of view)
35mm equivalent speed range:	F/4.3 (in terms of depth of field)
Diagonal angle of view:	70.5° @ 20mm - 44° @ 35mm
On Nikon D APS-C [1.53x] cameras:
35mm equivalent focal length range:	30.6mm - 53.6mm (in terms of field of view)
35mm equivalent speed range:	F/4.3 (in terms of depth of field)
Diagonal angle of view:	70.5° @ 20mm - 44° @ 35mm
On Pentax K APS-C [1.53x] cameras:
35mm equivalent focal length range:	30.6mm - 53.6mm (in terms of field of view)
35mm equivalent speed range:	F/4.3 (in terms of depth of field)
Diagonal angle of view:	70.5° @ 20mm - 44° @ 35mm
Diaphragm mechanism:
Diaphragm type:	Automatic
Aperture control:	None; the aperture is controlled from the camera (Canon EF, Minolta/Sony A)
Aperture control:	Aperture ring (Manual settings + Auto Exposure setting) (Nikon F, Pentax K)
Number of blades:	9 (nine)
Zooming:
Zoom mechanism:	Manual
Zoom control:	Zoom ring
Zoom type:	Rotary
Zooming method:	Internal zooming
Focusing:
Closest focusing distance:	0.50m
Magnification ratio:	1:11.6 @ 35mm
Focusing modes:	Autofocus (A), Manual focus (M)
Autofocus motor:	Micromotor (Canon EF)
Autofocus motor:	In-camera motor (Minolta/Sony A, Nikon F, Pentax K)
Manual focus control:	Focusing ring
Focus mode selector:	Tokina Focus Clutch Mechanism
Manual focus override in autofocus mode:	-
Vibration Correction Module (VCM):
Built-in VCM:	-
Physical characteristics:
Weight:	585g (Nikon F)
Maximum diameter x Length:	⌀84×85.5mm (Nikon F)
Accessories:
Filters:	Screw-type 77mm
Lens hood:	BH-771 - Bayonet-type petal-shaped
Teleconverters:	<No data>

Source of data

Manufacturer's technical data.

Manufacturer description

The AT-X 235 AF PRO is a wide-angle zoom lens that will produce dynamic images, which are sharp from edge to edge. The fast, constant maximum aperture of f/2.8 makes wide-angle photography, like reporting, effortless in difficult lighting situations such as indoors or at dusk.

Two pioneering all-glass aspherical lens elements, one front and rear, (F&R aspherical) are employed to eliminate wide-angle spherical astigmatism and correct edge/marginal light rays for superb image quality. Hoya Corporation, the world's largest optical glass manufacturer, has created a micron-tuned precision molding technique with the accuracy to form aspherical surfaces to the thousandths of a millimeter. These aspherical elements, as well as 11 more of the remaining 13, receive Tokina's unique multi-coatings to further improve optical performance.

Continuing the tradition of AT-X, this AT-X PRO series lens boasts a solid, all metal construction using duraluminum alloy. Tokina's Focus Clutch Mechanism allows maximum AF response and sensitivity while focusing manually.

Notes

The autofocus will not be available with Nikon D40, D40X, D60, D3000-D3500, D5000-D5600 digital SLR cameras.

Lenses with similar focal length range

■Canon EF mount (21)
Canon EF 17-40mm F/4L USM • ⌀77	Pro	2003 ●	compare	7	2
Advantages: 7 Disadvantages: 2 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Slightly longer reach at the longer end · Slower @ 17mm · Slower @ 40mm · Optimized for digital cameras · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.17 vs 1:11.6) · Ring-type Ultrasonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Slightly lighter (500g vs 585g) · Slightly larger (97mm vs 85.5mm) · Weather-sealed NOTE: Approximate weight and length were used for comparison purposes. HIDE
Canon EF 20-35mm F/3.5-4.5 USM • ⌀77		1993 ●	compare	4	2
Advantages: 4 Disadvantages: 2 · Older model (1993) · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (5 vs 9) · Smaller closest focusing distance (0.34m vs 0.50m) · Larger magnification (1:7.7 vs 1:11.6) · Ring-type Ultrasonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Much lighter (340g vs 585g) · Slightly smaller (69mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Canon EF 20-35mm F/2.8L • ⌀72	Pro	1989 ●	compare	0	0
Advantages: 0 Disadvantages: 0 · Older model (1989) · Floating element system · Less diaphragm blades (6 vs 9) · Slightly larger magnification (1:11.11 vs 1:11.6) · Arc-Form Drive instead of Micromotor · Does not feature a Focus Clutch Mechanism · Smaller filter size (72mm vs 77mm) HIDE
Canon EF 17-35mm F/2.8L USM • ⌀77	Pro	1996 ●	compare	4	0
Advantages: 4 Disadvantages: 0 · Wider focal range · Wider field of view at the shorter end · Less diaphragm blades (7 vs 9) · Slightly smaller closest focusing distance (0.42m vs 0.50m) · Slightly larger magnification (1:9.1 vs 1:11.6) · Ring-type Ultrasonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Slightly larger (95.7mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Cosina AF 19-35mm F/3.5-4.5 MC • ⌀77 akaPhoenix AF 19-35mm F/3.5-4.5 akaPromaster Spectrum 7 AF 19-35mm F/3.5-4.5 MC akaSoligor AF 19-35mm F/3.5-4.5 MC akaVivitar Series 1 AF 19-35mm F/3.5-4.5 MC akaVoigtlander Ultragon AF 19-35mm F/3.5-4.5 VMC		●	compare	1	3
Advantages: 1 Disadvantages: 3 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (300g vs 585g) · Slightly smaller (69.5mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Cosina AF 19-35mm F/3.5-4.5 MC Digital • ⌀77		2004 ●	compare	3	3
Advantages: 3 Disadvantages: 3 · Newer model (2004) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Optimized for digital cameras · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (300g vs 585g) · Smaller (67.2mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 17-35mm F/2.8-4 EX DG [HSM] • ⌀77	Pro	2003 ●	compare	6	3
Advantages: 6 Disadvantages: 3 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (8 vs 9) · Smaller closest focusing distance (0.27m vs 0.50m) · Larger magnification (1:4.5 vs 1:11.6) · Hyper Sonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode HIDE
Sigma 20-40mm F/2.8 EX DG Aspherical IF • ⌀82	Pro	2001 ●	compare	3	2
Advantages: 3 Disadvantages: 2 · Newer model (2001) · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Optimized for digital cameras · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:4.6 vs 1:11.6) · Larger (107.8mm vs 85.5mm) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 18-35mm F/3.5-4.5 Aspherical ZEN • ⌀82 akaQuantaray Tech-10 AF 18-35mm F/3.5-4.5		1994 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Older model (1994) · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 18mm · Slower @ 35mm · Floating element system · Less diaphragm blades (6 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (280g vs 585g) · Slightly smaller (71.5mm vs 85.5mm) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 21-35mm F/3.5-4.2 ZEN • ⌀77		1988 ●	compare	0	3
Advantages: 0 Disadvantages: 3 · Older model (1988) · Slightly narrower focal range · Slightly narrower field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 21mm · Slower @ 35mm · Pure spherical design · Floating element system · Less diaphragm blades (6 vs 9) · Slightly smaller magnification (1:12.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (480g vs 585g) · Larger (104.5mm vs 85.5mm) · Built-in lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 17-35mm F/2.8-4 EX Aspherical [HSM] • ⌀82	Pro	1999 ●	compare	5	3
Advantages: 5 Disadvantages: 3 · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Less diaphragm blades (8 vs 9) · Slightly larger magnification (1:11.5 vs 1:11.6) · Hyper Sonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Lighter (400g vs 585g) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron SP AF 17-35mm F/2.8-4 Di LD Aspherical [IF] A05 • ⌀77	Pro	2003 ●	compare	5	3
Advantages: 5 Disadvantages: 3 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:5.4 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (440g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron SP AF 20-40mm F/2.7-3.5 Aspherical [IF] 166D • ⌀77		1994 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Older model (1994) · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Variable speed across the focal length range · Slightly faster @ 20mm · Slightly slower @ 40mm · Less diaphragm blades (6 vs 9) · Slightly larger magnification (1:10.2 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (525g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron SP AF 20-40mm F/2.7-3.5 Aspherical [IF] 266D • ⌀77		2000 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Variable speed across the focal length range · Slightly faster @ 20mm · Slightly slower @ 40mm · Less diaphragm blades (6 vs 9) · Slightly larger magnification (1:10.2 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (525g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron AF 19-35mm F/3.5-4.5 A10 • ⌀77		2002 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Newer model (2002) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (317g vs 585g) · Smaller (67.7mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron 17-35mm F/2.8-4 Di OSD A037 • ⌀77	Pro	2018 ●	compare	8	3
Advantages: 8 Disadvantages: 3 · Newer model (2018) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.9 vs 1:11.6) · Optimized Silent Drive instead of Micromotor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Lighter (460g vs 585g) · Weather-sealed · Fluorine coating NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 19-35mm F/3.5-4.5 • ⌀77 akaQuantaray AF 19-35mm F/3.5-4.5		2000 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Slightly larger magnification (1:9.28 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (400g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AT-X Pro AF SD 17-35mm F/4 [IF] • ⌀82	Pro	2011 ●	compare	5	2
Advantages: 5 Disadvantages: 2 · Newer model (2011) · Wider focal range · Wider field of view at the shorter end · Slower @ 17mm · Slower @ 35mm · Optimized for digital cameras · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.82 vs 1:11.6) · Slightly larger (94.5mm vs 85.5mm) · Weather-sealed · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 II • ⌀77		1996 ●	compare	0	3
Advantages: 0 Disadvantages: 3 · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Does not feature a Focus Clutch Mechanism · Slightly lighter (500g vs 585g) · Slightly smaller (74.5mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 • ⌀72		1990 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Older model (1990) · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Does not feature a Focus Clutch Mechanism · Lighter (460g vs 585g) · Smaller (68.1mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina atx-i 17-35mm F/4 FF • ⌀82	Pro	2020 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2020) · In production · Wider focal range · Wider field of view at the shorter end · Slower @ 17mm · Slower @ 35mm · Optimized for digital cameras · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.82 vs 1:11.6) · Silent Drive Module instead of Micromotor · Slightly larger (97mm vs 85.5mm) · Weather-sealed lens mount · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Canon EF mount (1) · APS-C
Sigma 18-35mm F/1.8 DC HSM \| A • ⌀72		2013 ●	compare	7	2
Advantages: 7 Disadvantages: 2 · Newer model (2013) · In production · APS-C · Faster @ 18mm · Faster @ 35mm · Optimized for digital cameras · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.3 vs 1:11.6) · Hyper Sonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Heavier (810g vs 585g) · Much larger (121mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Minolta/Sony A mount (17)
Cosina AF 19-35mm F/3.5-4.5 MC • ⌀77 akaPhoenix AF 19-35mm F/3.5-4.5 akaPromaster Spectrum 7 AF 19-35mm F/3.5-4.5 MC akaSoligor AF 19-35mm F/3.5-4.5 MC akaVivitar Series 1 AF 19-35mm F/3.5-4.5 MC akaVoigtlander Ultragon AF 19-35mm F/3.5-4.5 VMC		●	compare	1	3
Advantages: 1 Disadvantages: 3 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (300g vs 585g) · Slightly smaller (69.5mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Cosina AF 19-35mm F/3.5-4.5 MC Digital • ⌀77		2004 ●	compare	3	3
Advantages: 3 Disadvantages: 3 · Newer model (2004) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Optimized for digital cameras · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (300g vs 585g) · Smaller (67.2mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Konica Minolta AF 17-35mm F/2.8-4 D • ⌀77	Pro	2004 ●	compare	5	3
Advantages: 5 Disadvantages: 3 · Newer model (2004) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:5.4 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Lighter (430g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Minolta AF 17-35mm F/3.5 G • ⌀77	Pro	1997 ●	compare	4	0
Advantages: 4 Disadvantages: 0 · Wider focal range · Wider field of view at the shorter end · Slightly slower @ 17mm · Slightly slower @ 35mm · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:5.88 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode HIDE
Minolta AF 20-35mm F/3.5-4.5 • ⌀72		1998 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Much lighter (325g vs 585g) · Slightly smaller (69.5mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 17-35mm F/2.8-4 EX DG [HSM] • ⌀77	Pro	2003 ●	compare	4	3
Advantages: 4 Disadvantages: 3 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (8 vs 9) · Smaller closest focusing distance (0.27m vs 0.50m) · Larger magnification (1:4.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism HIDE
Sigma 20-40mm F/2.8 EX DG Aspherical IF • ⌀82	Pro	2001 ●	compare	3	2
Advantages: 3 Disadvantages: 2 · Newer model (2001) · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Optimized for digital cameras · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:4.6 vs 1:11.6) · Larger (107.8mm vs 85.5mm) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 18-35mm F/3.5-4.5 Aspherical ZEN • ⌀82 akaQuantaray Tech-10 AF 18-35mm F/3.5-4.5		1994 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Older model (1994) · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 18mm · Slower @ 35mm · Floating element system · Less diaphragm blades (6 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (280g vs 585g) · Slightly smaller (71.5mm vs 85.5mm) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 21-35mm F/3.5-4.2 ZEN • ⌀77		1988 ●	compare	0	3
Advantages: 0 Disadvantages: 3 · Older model (1988) · Slightly narrower focal range · Slightly narrower field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 21mm · Slower @ 35mm · Pure spherical design · Floating element system · Less diaphragm blades (6 vs 9) · Slightly smaller magnification (1:12.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (480g vs 585g) · Larger (104.5mm vs 85.5mm) · Built-in lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 17-35mm F/2.8-4 EX Aspherical [HSM] • ⌀82	Pro	1999 ●	compare	3	3
Advantages: 3 Disadvantages: 3 · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Less diaphragm blades (8 vs 9) · Slightly larger magnification (1:11.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (400g vs 585g) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron SP AF 17-35mm F/2.8-4 Di LD Aspherical [IF] A05 • ⌀77	Pro	2003 ●	compare	5	3
Advantages: 5 Disadvantages: 3 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:5.4 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (440g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron SP AF 20-40mm F/2.7-3.5 Aspherical [IF] 166D • ⌀77		1994 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Older model (1994) · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Variable speed across the focal length range · Slightly faster @ 20mm · Slightly slower @ 40mm · Less diaphragm blades (6 vs 9) · Slightly larger magnification (1:10.2 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (525g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron SP AF 20-40mm F/2.7-3.5 Aspherical [IF] 266D • ⌀77		2000 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Variable speed across the focal length range · Slightly faster @ 20mm · Slightly slower @ 40mm · Less diaphragm blades (6 vs 9) · Slightly larger magnification (1:10.2 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (525g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron AF 19-35mm F/3.5-4.5 A10 • ⌀77		2002 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Newer model (2002) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (317g vs 585g) · Smaller (67.7mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 19-35mm F/3.5-4.5 • ⌀77 akaQuantaray AF 19-35mm F/3.5-4.5		2000 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Slightly larger magnification (1:9.28 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (400g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 II • ⌀77		1996 ●	compare	0	3
Advantages: 0 Disadvantages: 3 · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Does not feature a Focus Clutch Mechanism · Slightly lighter (500g vs 585g) · Slightly smaller (74.5mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 • ⌀72		1990 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Older model (1990) · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Does not feature a Focus Clutch Mechanism · Lighter (460g vs 585g) · Smaller (68.1mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Minolta/Sony A mount (1) · APS-C
Sigma 18-35mm F/1.8 DC HSM \| A • ⌀72		2013 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2013) · APS-C · Faster @ 18mm · Faster @ 35mm · Optimized for digital cameras · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.3 vs 1:11.6) · Hyper Sonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Heavier (810g vs 585g) · Much larger (121mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Nikon F mount (21)
Cosina AF 19-35mm F/3.5-4.5 MC • ⌀77 akaPhoenix AF 19-35mm F/3.5-4.5 akaPromaster Spectrum 7 AF 19-35mm F/3.5-4.5 MC akaSoligor AF 19-35mm F/3.5-4.5 MC akaVivitar Series 1 AF 19-35mm F/3.5-4.5 MC akaVoigtlander Ultragon AF 19-35mm F/3.5-4.5 VMC		●	compare	1	3
Advantages: 1 Disadvantages: 3 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (300g vs 585g) · Slightly smaller (69.5mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Cosina AF 19-35mm F/3.5-4.5 MC Digital • ⌀77		2004 ●	compare	3	3
Advantages: 3 Disadvantages: 3 · Newer model (2004) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Optimized for digital cameras · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (300g vs 585g) · Smaller (67.2mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Nikon AF Nikkor 18-35mm F/3.5-4.5D IF-ED • ⌀77		2000 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 18mm · Slower @ 35mm · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.33m vs 0.50m) · Larger magnification (1:6.67 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (370g vs 585g) HIDE
Nikon AF-S Nikkor 17-35mm F/2.8D IF-ED • ⌀77	Pro	1999 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · In production · Wider focal range · Wider field of view at the shorter end · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.55 vs 1:11.6) · Silent Wave Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Heavier (745g vs 585g) · Larger (106mm vs 85.5mm) HIDE
Nikon AF Nikkor 20-35mm F/2.8D IF • ⌀77	Pro	1993 ●	compare	0	0
Advantages: 0 Disadvantages: 0 · Older model (1993) · Does not feature a Focus Clutch Mechanism HIDE
Nikon AF-S Nikkor 18-35mm F/3.5-4.5G ED • ⌀77		2013 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2013) · In production · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 18mm · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:5 vs 1:11.6) · Silent Wave Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Lighter (385g vs 585g) · Slightly larger (95mm vs 85.5mm) HIDE
Sigma 17-35mm F/2.8-4 EX DG [HSM] • ⌀77	Pro	2003 ●	compare	6	3
Advantages: 6 Disadvantages: 3 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (8 vs 9) · Smaller closest focusing distance (0.27m vs 0.50m) · Larger magnification (1:4.5 vs 1:11.6) · Hyper Sonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode HIDE
Sigma 20-40mm F/2.8 EX DG Aspherical IF • ⌀82	Pro	2001 ●	compare	3	2
Advantages: 3 Disadvantages: 2 · Newer model (2001) · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Optimized for digital cameras · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:4.6 vs 1:11.6) · Larger (107.8mm vs 85.5mm) · Larger filter size (82mm vs 77mm) HIDE
Sigma 18-35mm F/3.5-4.5 Aspherical ZEN • ⌀82 akaQuantaray Tech-10 AF 18-35mm F/3.5-4.5		1994 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Older model (1994) · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 18mm · Slower @ 35mm · Floating element system · Less diaphragm blades (6 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (280g vs 585g) · Slightly smaller (71.5mm vs 85.5mm) · Larger filter size (82mm vs 77mm) HIDE
Sigma 21-35mm F/3.5-4.2 ZEN • ⌀77		1988 ●	compare	0	3
Advantages: 0 Disadvantages: 3 · Older model (1988) · Slightly narrower focal range · Slightly narrower field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 21mm · Slower @ 35mm · Pure spherical design · Floating element system · Less diaphragm blades (6 vs 9) · Slightly smaller magnification (1:12.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (480g vs 585g) · Larger (104.5mm vs 85.5mm) · Built-in lens hood HIDE
Sigma 17-35mm F/2.8-4 EX Aspherical [HSM] • ⌀82	Pro	1999 ●	compare	3	3
Advantages: 3 Disadvantages: 3 · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Less diaphragm blades (8 vs 9) · Slightly larger magnification (1:11.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (400g vs 585g) · Larger filter size (82mm vs 77mm) HIDE
Tamron SP AF 17-35mm F/2.8-4 Di LD Aspherical [IF] A05 • ⌀77	Pro	2003 ●	compare	5	3
Advantages: 5 Disadvantages: 3 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:5.4 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (440g vs 585g) HIDE
Tamron SP AF 20-40mm F/2.7-3.5 Aspherical [IF] 166D • ⌀77		1994 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Older model (1994) · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Variable speed across the focal length range · Slightly faster @ 20mm · Slightly slower @ 40mm · Less diaphragm blades (6 vs 9) · Slightly larger magnification (1:10.2 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (525g vs 585g) HIDE
Tamron SP AF 20-40mm F/2.7-3.5 Aspherical [IF] 266D • ⌀77		2000 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Variable speed across the focal length range · Slightly faster @ 20mm · Slightly slower @ 40mm · Less diaphragm blades (6 vs 9) · Slightly larger magnification (1:10.2 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Slightly lighter (525g vs 585g) HIDE
Tamron AF 19-35mm F/3.5-4.5 A10 • ⌀77		2002 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Newer model (2002) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (317g vs 585g) · Smaller (67.7mm vs 85.5mm) HIDE
Tamron 17-35mm F/2.8-4 Di OSD A037 • ⌀77	Pro	2018 ●	compare	9	3
Advantages: 9 Disadvantages: 3 · Newer model (2018) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Electromagnetic diaphragm control system · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.9 vs 1:11.6) · Optimized Silent Drive · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Lighter (460g vs 585g) · Weather-sealed · Fluorine coating HIDE
Tokina AF 19-35mm F/3.5-4.5 • ⌀77 akaQuantaray AF 19-35mm F/3.5-4.5		2000 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Slightly larger magnification (1:9.28 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (400g vs 585g) HIDE
Tokina AT-X Pro AF SD 17-35mm F/4 [IF] • ⌀82	Pro	2011 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2011) · Wider focal range · Wider field of view at the shorter end · Slower @ 17mm · Slower @ 35mm · Optimized for digital cameras · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.82 vs 1:11.6) · Micromotor · Slightly larger (94.5mm vs 85.5mm) · Weather-sealed · Larger filter size (82mm vs 77mm) HIDE
Tokina AF 20-35mm F/3.5-4.5 II • ⌀77		1996 ●	compare	0	3
Advantages: 0 Disadvantages: 3 · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Does not feature a Focus Clutch Mechanism · Slightly lighter (500g vs 585g) · Slightly smaller (74.5mm vs 85.5mm) HIDE
Tokina AF 20-35mm F/3.5-4.5 • ⌀72		1990 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Older model (1990) · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Does not feature a Focus Clutch Mechanism · Lighter (460g vs 585g) · Smaller (68.1mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) HIDE
Tokina atx-i 17-35mm F/4 FF • ⌀82	Pro	2020 ●	compare	7	2
Advantages: 7 Disadvantages: 2 · Newer model (2020) · In production · Wider focal range · Wider field of view at the shorter end · Slower @ 17mm · Slower @ 35mm · Optimized for digital cameras · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.82 vs 1:11.6) · Silent Drive Module · Slightly larger (95mm vs 85.5mm) · Weather-sealed lens mount · Larger filter size (82mm vs 77mm) HIDE

■Nikon F mount (1) · APS-C
Sigma 18-35mm F/1.8 DC HSM \| A • ⌀72		2013 ●	compare	7	2
Advantages: 7 Disadvantages: 2 · Newer model (2013) · In production · APS-C · Faster @ 18mm · Faster @ 35mm · Optimized for digital cameras · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.3 vs 1:11.6) · Hyper Sonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Heavier (810g vs 585g) · Much larger (121mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Pentax K mount (12)
Cosina AF 19-35mm F/3.5-4.5 MC • ⌀77 akaPhoenix AF 19-35mm F/3.5-4.5 akaPromaster Spectrum 7 AF 19-35mm F/3.5-4.5 MC akaSoligor AF 19-35mm F/3.5-4.5 MC akaVivitar Series 1 AF 19-35mm F/3.5-4.5 MC akaVoigtlander Ultragon AF 19-35mm F/3.5-4.5 VMC		●	compare	1	3
Advantages: 1 Disadvantages: 3 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (300g vs 585g) · Slightly smaller (69.5mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Cosina AF 19-35mm F/3.5-4.5 MC Digital • ⌀77		2004 ●	compare	3	3
Advantages: 3 Disadvantages: 3 · Newer model (2004) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Optimized for digital cameras · Pure spherical design · Less diaphragm blades (8 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (300g vs 585g) · Smaller (67.2mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
smc Pentax-FA 20-35mm F/4 AL • ⌀58		1998 ●	compare	4	3
Advantages: 4 Disadvantages: 3 · Extends while zooming · Slower @ 20mm · Slower @ 35mm · Simpler optical design · Less diaphragm blades (8 vs 9) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:6.25 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (245g vs 585g) · Smaller (68mm vs 85.5mm) · Smaller filter size (58mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
smc Pentax-FA J 18-35mm F/4-5.6 AL • ⌀67		2003 ●	compare	3	4
Advantages: 3 Disadvantages: 4 · Newer model (2003) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 18mm · Much slower @ 35mm · Less diaphragm blades (6 vs 9) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:5.56 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (203g vs 585g) · Slightly smaller (69mm vs 85.5mm) · Smaller filter size (67mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 17-35mm F/2.8-4 EX DG [HSM] • ⌀77	Pro	2003 ●	compare	4	3
Advantages: 4 Disadvantages: 3 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (8 vs 9) · Smaller closest focusing distance (0.27m vs 0.50m) · Larger magnification (1:4.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism HIDE
Sigma 20-40mm F/2.8 EX DG Aspherical IF • ⌀82	Pro	2001 ●	compare	3	2
Advantages: 3 Disadvantages: 2 · Newer model (2001) · Wider focal range · Slightly longer reach at the longer end · Extends while zooming · Optimized for digital cameras · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:4.6 vs 1:11.6) · Larger (107.8mm vs 85.5mm) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 18-35mm F/3.5-4.5 Aspherical ZEN • ⌀82 akaQuantaray Tech-10 AF 18-35mm F/3.5-4.5		1994 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Older model (1994) · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 18mm · Slower @ 35mm · Floating element system · Less diaphragm blades (6 vs 9) · Slightly smaller magnification (1:12 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Much lighter (280g vs 585g) · Slightly smaller (71.5mm vs 85.5mm) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 17-35mm F/2.8-4 EX Aspherical [HSM] • ⌀82	Pro	1999 ●	compare	3	3
Advantages: 3 Disadvantages: 3 · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Less diaphragm blades (8 vs 9) · Slightly larger magnification (1:11.5 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (400g vs 585g) · Larger filter size (82mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron SP AF 17-35mm F/2.8-4 Di LD Aspherical [IF] A05 • ⌀77	Pro	2003 ●	compare	5	3
Advantages: 5 Disadvantages: 3 · Newer model (2003) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Variable speed across the focal length range · Slower @ 35mm · Optimized for digital cameras · Less diaphragm blades (7 vs 9) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:5.4 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (440g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 19-35mm F/3.5-4.5 • ⌀77 akaQuantaray AF 19-35mm F/3.5-4.5		2000 ●	compare	1	2
Advantages: 1 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Variable speed across the focal length range · Slightly slower @ 19mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Slightly larger magnification (1:9.28 vs 1:11.6) · Does not feature a Focus Clutch Mechanism · Lighter (400g vs 585g) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 II • ⌀77		1996 ●	compare	0	3
Advantages: 0 Disadvantages: 3 · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Does not feature a Focus Clutch Mechanism · Slightly lighter (500g vs 585g) · Slightly smaller (74.5mm vs 85.5mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 • ⌀72		1990 ●	compare	2	3
Advantages: 2 Disadvantages: 3 · Older model (1990) · Extends while zooming · Variable speed across the focal length range · Slightly slower @ 20mm · Slower @ 35mm · Pure spherical design · Less diaphragm blades (6 vs 9) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Does not feature a Focus Clutch Mechanism · Lighter (460g vs 585g) · Smaller (68.1mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Pentax K mount (2) · APS-C
HD Pentax-DA 20-40mm F/2.8-4 ED DC WR Limited • ⌀55		2013 ●	compare	9	3
Advantages: 9 Disadvantages: 3 · Newer model (2013) · In production · APS-C · Extends while zooming · Variable speed across the focal length range · Slower @ 40mm · Optimized for digital cameras · Simpler optical design · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:5 vs 1:11.6) · Micromotor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Much lighter (283g vs 585g) · Slightly smaller (68.5mm vs 85.5mm) · Weather-sealed · Fluorine coating · Smaller filter size (55mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 18-35mm F/1.8 DC HSM \| A • ⌀72		2013 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2013) · APS-C · Faster @ 18mm · Faster @ 35mm · Optimized for digital cameras · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.3 vs 1:11.6) · Hyper Sonic Motor · Does not feature a Focus Clutch Mechanism · Manual focus override in autofocus mode · Heavier (810g vs 585g) · Much larger (121mm vs 85.5mm) · Smaller filter size (72mm vs 77mm) NOTE: Approximate weight and length were used for comparison purposes. HIDE

Position of focus clutch	Position of focus mode switch	Lens focus mode
AF	AF	Autofocus mode. The focusing ring is disengaged from the focusing mechanism and does not rotate during autofocus
MF	AF	Autofocus mode. The focusing ring rotates during autofocus
AF	M	Focusing is completely disabled
MF	M	Manual focus mode

Almaz-103

Alpa

Asahi Pentax M42

Asahiflex M37

Bronica

Bronica ETR

Bronica GS-1

Bronica RF645

Bronica SQ

Canon EOS

Canon EOS APS-C

Canon EOS M

Canon EOS R

Canon EOS R APS-C

Canon FD

Canon FL

Canon R

Canon S (J)

Canon S (LSM)

Chinon K

Chinon M42

Contarex

Contax

Contax/Praktica

Contax/Yashica

Contax 645

Contax G

Contax N

Cosina K

Cosina M42

Exakta

Exakta 6x6 (horizontal)

Exakta 66

Exakta 66 (vertical)

Exakta Twin TL

Exakta real

FED

Fujica GS645 Professional

Fujica M42

Fujica X

Fujifilm G

Fujifilm GA645 Professional

Fujifilm X

Hasselblad 1600F/1000F

Hasselblad H

Hasselblad V

Hasselblad X

Hasselblad XPan

Icarex

Kiev-17/19/20

Kiev-II/III/4/5

Kiev 6S/60

Konica AR

Konica F

Kowa Six

Leica CL

Leica L

Leica L APS-C

Leica M

Leica R

Leica S

Leica SM

Leotax

Mamiya 6

Mamiya 7

Mamiya CP M42

Mamiya CS

Mamiya E

Mamiya ES

Mamiya M645

Mamiya RB67

Mamiya RZ67

Mamiya SX M42

Mamiya TL/DTL M42

Minolta-35

Minolta A

Minolta CLE

Minolta SR

Miranda

Nicca/Yashica