Sigma 21-35mm F/3.5-4.2 ZEN

Wide-angle zoom lens • Film era • Discontinued

Announced:
· 1988
Production status:
● Discontinued
Country of design:
· Japan
Original name:
· SIGMA ZOOM AF-γ 1:3.5~4.2 f=21~35mm MULTI-COATED
Class:
· Slow full-frame wide-angle zoom lens

Specification

Optical design:
Maximum format:	35mm full frame
Focal length range:	21mm - 35mm [1.7X zoom ratio]
Speed range:	F/3.5 @ 21mm - F/4.2 @ 35mm
Lens construction:	12 elements in 12 groups
Lens construction:	Floating element system
Mount and Flange focal distance:	Canon EF [44mm]
	Minolta/Sony A [44.5mm]
	Nikon F [46.5mm]
	Sigma SA [44mm]
Diagonal angle of view:	91.7° @ 21mm - 63.4° @ 35mm (35mm full frame)
On Canon EOS APS-C [1.59x] cameras:
35mm equivalent focal length range:	33.4mm - 55.7mm (in terms of field of view)
35mm equivalent speed range:	F/5.6 @ 21mm - F/6.7 @ 35mm (in terms of depth of field)
Diagonal angle of view:	65.9° @ 21mm - 42.5° @ 35mm
On Sony DSLR-A/SLT-A APS-C [1.53x] cameras:
35mm equivalent focal length range:	32.1mm - 53.6mm (in terms of field of view)
35mm equivalent speed range:	F/5.4 @ 21mm - F/6.4 @ 35mm (in terms of depth of field)
Diagonal angle of view:	67.9° @ 21mm - 44° @ 35mm
On Nikon D APS-C [1.53x] cameras:
35mm equivalent focal length range:	32.1mm - 53.6mm (in terms of field of view)
35mm equivalent speed range:	F/5.4 @ 21mm - F/6.4 @ 35mm (in terms of depth of field)
Diagonal angle of view:	67.9° @ 21mm - 44° @ 35mm
On Sigma SD APS-C [1.74x] cameras:
35mm equivalent focal length range:	36.5mm - 60.9mm (in terms of field of view)
35mm equivalent speed range:	F/6.1 @ 21mm - F/7.3 @ 35mm (in terms of depth of field)
Diagonal angle of view:	61.2° @ 21mm - 39.1° @ 35mm
Diaphragm mechanism:
Diaphragm type:	Automatic
Aperture control:	None; the aperture is controlled from the camera (Canon EF, Minolta/Sony A, Sigma SA)
Aperture control:	Aperture ring (Manual settings + Auto Exposure setting) (Nikon F)
Number of blades:	6 (six)
Zooming:
Zoom mechanism:	Manual
Zoom control:	Zoom ring
Zoom type:	Rotary
Zooming method:	Internal zooming
Focusing:
Closest focusing distance:	0.50m
Magnification ratio:	1:12.5 @ 35mm
Focusing modes:	Autofocus (AF), Manual focus (M)
Autofocus motor:	Micromotor (Canon EF, Sigma SA)
Autofocus motor:	In-camera motor (Minolta/Sony A, Nikon F)
Manual focus control:	Focusing ring
Focus mode selector:	AF - M (Canon EF, Sigma SA)
Focus mode selector:	None; focusing mode is set from the camera (Minolta/Sony A, Nikon F)
Manual focus override in autofocus mode:	-
Optical Stabilizer (OS):
Built-in OS:	-
Physical characteristics:
Weight:	480g (Nikon F)
Maximum diameter x Length:	⌀87.5×104.5mm (Nikon F)
Accessories:
Filters:	Screw-type 77mm
Lens hood:	Built-in petal-shaped
Teleconverters:	<No data>

Source of data

Manufacturer's technical data.

Manufacturer description

As the focal length decreases to wide angle and ultra wide angle, even a 1mm variation of focal length has a significant effect on the image. Sigma's 21-35mm ultra wide-angle zoom lens boasts a maximum wide angle of 21mm. It effectively covers the equivalent of four wide-angle lenses: 21mm, 24mm, 28mm and 35mm. In particular the impressive perspective change from the 21mm to the 24mm range is only obtainable from ultra wide-angle lenses. While widening practically to the limit of wide-angle lenses, Sigma succeeded in thoroughly eliminating distortion. The use of a floating focus mechanism alleviates close-range astigmatism and flare obtaining optical characteristics approaching single-focus lenses. It is fitted with a fixed "perfect" hood.

Notes

The autofocus will not be available with Nikon D40, D40X, D60, D3000-D3500, D5000-D5600 digital SLR cameras.
Sigma had to reverse engineer the communication protocol of the Canon EF mount to produce a version of this lens for Canon EOS 35mm film SLR cameras. As a consequence, this lens may not work properly with Canon EOS cameras (both film and digital) due to compatibility issues.

Frequently asked questions

What does the Sigma lens designation "ZEN" mean?

It means that the lens has a ZEN finish. ZEN is an acronym for Zeitgeist ("the spirit of the times"), Enhancement, and Nonglare. This nonreflective urethane resin finish was introduced around 1989 and replaced the old-style, painted satin-black finish. Sigma claimed it to be hard, strong, antichemical, nonslip, antiglare, and scratch-resistant, however, it actually had a tendency to peel off and become sticky as it aged.

Lenses with similar focal length range

■Canon EF mount (13)
Canon EF 20-35mm F/3.5-4.5 USM • ⌀77		1993 ●	compare	6	0
Advantages: 6 Disadvantages: 0 · Newer model (1993) · Slightly wider focal range · Slightly wider field of view at the shorter end · Slightly slower @ 35mm · No floating element system (but has internal focusing) · Less diaphragm blades (5 vs 6) · Smaller closest focusing distance (0.34m vs 0.50m) · Larger magnification (1:7.7 vs 1:12.5) · Ring-type Ultrasonic Motor · Manual focus override in autofocus mode · Lighter (340g vs 480g) · Smaller (69mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Canon EF 20-35mm F/2.8L • ⌀72	Pro	1989 ●	compare	3	0
Advantages: 3 Disadvantages: 0 · Slightly wider focal range · Slightly wider field of view at the shorter end · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 35mm · Aspherical design · Slightly larger magnification (1:11.11 vs 1:12.5) · Arc-Form Drive instead of Micromotor · Slightly heavier (570g vs 480g) · Slightly smaller (89mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood 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	3	2
Advantages: 3 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (300g vs 480g) · Smaller (69.5mm vs 104.5mm) · Detachable lens hood 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	4	2
Advantages: 4 Disadvantages: 2 · Newer model (2004) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · Optimized for digital cameras · No floating element system · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (300g vs 480g) · Smaller (67.2mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 20-40mm F/2.8 EX DG Aspherical IF • ⌀82	Pro	2001 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2001) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 40mm · Optimized for digital cameras · More complex optical design · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:4.6 vs 1:12.5) · Features Focus Clutch Mechanism · Heavier (595g vs 480g) · Larger filter size (82mm vs 77mm) · Detachable lens hood 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	5	0
Advantages: 5 Disadvantages: 0 · Newer model (1994) · Wider focal range · Wider field of view at the shorter end · Slightly slower @ 35mm · Aspherical design · Slightly larger magnification (1:12 vs 1:12.5) · Much lighter (280g vs 480g) · Smaller (71.5mm vs 104.5mm) · Larger filter size (82mm vs 77mm) · Detachable lens hood 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	3	1
Advantages: 3 Disadvantages: 1 · Newer model (1994) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Slightly faster @ 20mm · Slightly faster @ 40mm · Aspherical design · No floating element system (but has internal focusing) · Slightly larger magnification (1:10.2 vs 1:12.5) · Smaller (81mm vs 104.5mm) · Detachable lens hood 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	3	1
Advantages: 3 Disadvantages: 1 · Newer model (2000) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Slightly faster @ 20mm · Slightly faster @ 40mm · Aspherical design · No floating element system (but has internal focusing) · Slightly larger magnification (1:10.2 vs 1:12.5) · Smaller (81mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron AF 19-35mm F/3.5-4.5 A10 • ⌀77		2002 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (2002) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system (but has internal focusing) · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (317g vs 480g) · Smaller (67.7mm vs 104.5mm) · Detachable lens hood 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	2	0
Advantages: 2 Disadvantages: 0 · Newer model (2000) · Slightly wider focal range · Slightly wider field of view at the shorter end · Slightly slower @ 35mm · No floating element system (but has internal focusing) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Slightly larger magnification (1:9.28 vs 1:12.5) · Slightly lighter (400g vs 480g) · Smaller (77mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AT-X Pro AF 20-35mm F/2.8 • ⌀77	Pro	1998 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (1998) · Slightly wider focal range · Slightly wider field of view at the shorter end · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 35mm · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Slightly larger magnification (1:11.6 vs 1:12.5) · Features Focus Clutch Mechanism · Heavier (585g vs 480g) · Slightly smaller (85.5mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 II • ⌀77		1996 ●	compare	2	2
Advantages: 2 Disadvantages: 2 · Newer model (1996) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Smaller (74.5mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 • ⌀72		1990 ●	compare	2	2
Advantages: 2 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Smaller (68.1mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood 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	9	1
Advantages: 9 Disadvantages: 1 · Newer model (2013) · In production · APS-C · Constant F/1.8 speed across the focal length range · Much faster @ 18mm · Much faster @ 35mm · Optimized for digital cameras · More complex optical design · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.3 vs 1:12.5) · Hyper Sonic Motor · Manual focus override in autofocus mode · Much heavier (810g vs 480g) · Slightly larger (121mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Minolta/Sony A 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	3	2
Advantages: 3 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (300g vs 480g) · Smaller (69.5mm vs 104.5mm) · Detachable lens hood 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	4	2
Advantages: 4 Disadvantages: 2 · Newer model (2004) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · Optimized for digital cameras · No floating element system · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (300g vs 480g) · Smaller (67.2mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Minolta AF 20-35mm F/3.5-4.5 • ⌀72		1998 ●	compare	4	2
Advantages: 4 Disadvantages: 2 · Newer model (1998) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · More diaphragm blades (8 vs 6) · Manual focus override in autofocus mode · Lighter (325g vs 480g) · Smaller (69.5mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Sigma 20-40mm F/2.8 EX DG Aspherical IF • ⌀82	Pro	2001 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2001) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 40mm · Optimized for digital cameras · More complex optical design · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:4.6 vs 1:12.5) · Features Focus Clutch Mechanism · Heavier (595g vs 480g) · Larger filter size (82mm vs 77mm) · Detachable lens hood 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	5	0
Advantages: 5 Disadvantages: 0 · Newer model (1994) · Wider focal range · Wider field of view at the shorter end · Slightly slower @ 35mm · Aspherical design · Slightly larger magnification (1:12 vs 1:12.5) · Much lighter (280g vs 480g) · Smaller (71.5mm vs 104.5mm) · Larger filter size (82mm vs 77mm) · Detachable lens hood 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	3	1
Advantages: 3 Disadvantages: 1 · Newer model (1994) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Slightly faster @ 20mm · Slightly faster @ 40mm · Aspherical design · No floating element system (but has internal focusing) · Slightly larger magnification (1:10.2 vs 1:12.5) · Smaller (81mm vs 104.5mm) · Detachable lens hood 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	3	1
Advantages: 3 Disadvantages: 1 · Newer model (2000) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Slightly faster @ 20mm · Slightly faster @ 40mm · Aspherical design · No floating element system (but has internal focusing) · Slightly larger magnification (1:10.2 vs 1:12.5) · Smaller (81mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tamron AF 19-35mm F/3.5-4.5 A10 • ⌀77		2002 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (2002) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system (but has internal focusing) · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (317g vs 480g) · Smaller (67.7mm vs 104.5mm) · Detachable lens hood 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	2	0
Advantages: 2 Disadvantages: 0 · Newer model (2000) · Slightly wider focal range · Slightly wider field of view at the shorter end · Slightly slower @ 35mm · No floating element system (but has internal focusing) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Slightly larger magnification (1:9.28 vs 1:12.5) · Slightly lighter (400g vs 480g) · Smaller (77mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AT-X Pro AF 20-35mm F/2.8 • ⌀77	Pro	1998 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (1998) · Slightly wider focal range · Slightly wider field of view at the shorter end · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 35mm · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Slightly larger magnification (1:11.6 vs 1:12.5) · Features Focus Clutch Mechanism · Heavier (585g vs 480g) · Slightly smaller (85.5mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 II • ⌀77		1996 ●	compare	2	2
Advantages: 2 Disadvantages: 2 · Newer model (1996) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Smaller (74.5mm vs 104.5mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE
Tokina AF 20-35mm F/3.5-4.5 • ⌀72		1990 ●	compare	2	2
Advantages: 2 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Smaller (68.1mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood 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	8	1
Advantages: 8 Disadvantages: 1 · Newer model (2013) · APS-C · Constant F/1.8 speed across the focal length range · Much faster @ 18mm · Much faster @ 35mm · Optimized for digital cameras · More complex optical design · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.3 vs 1:12.5) · Hyper Sonic Motor · Has focus mode selector (AF - MF) · Manual focus override in autofocus mode · Much heavier (810g vs 480g) · Slightly larger (121mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Nikon F mount (14)
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	3	2
Advantages: 3 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (300g vs 480g) · Smaller (69.5mm vs 104.5mm) · Detachable lens hood 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	4	2
Advantages: 4 Disadvantages: 2 · Newer model (2004) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · Optimized for digital cameras · No floating element system · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (300g vs 480g) · Smaller (67.2mm vs 104.5mm) · Detachable lens hood 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	6	1
Advantages: 6 Disadvantages: 1 · Newer model (2000) · Wider focal range · Wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (7 vs 6) · Smaller closest focusing distance (0.33m vs 0.50m) · Larger magnification (1:6.67 vs 1:12.5) · Lighter (370g vs 480g) · Smaller (82.5mm vs 104.5mm) · Detachable lens hood HIDE
Nikon AF Nikkor 20-35mm F/2.8D IF • ⌀77	Pro	1993 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (1993) · Slightly wider focal range · Slightly wider field of view at the shorter end · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 35mm · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Has focus mode selector (A - M) · Heavier (640g vs 480g) · Slightly smaller (94mm vs 104.5mm) · Detachable lens hood HIDE
Nikon AF-S Nikkor 18-35mm F/3.5-4.5G ED • ⌀77		2013 ●	compare	8	0
Advantages: 8 Disadvantages: 0 · Newer model (2013) · In production · Wider focal range · Wider field of view at the shorter end · Slightly slower @ 35mm · Optimized for digital cameras · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (7 vs 6) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:5 vs 1:12.5) · Silent Wave Motor · Has focus mode selector (M/A - M) · Manual focus override in autofocus mode · Slightly lighter (385g vs 480g) · Detachable lens hood HIDE
Sigma 20-40mm F/2.8 EX DG Aspherical IF • ⌀82	Pro	2001 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2001) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 40mm · Optimized for digital cameras · More complex optical design · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:4.6 vs 1:12.5) · Features Focus Clutch Mechanism · Heavier (595g vs 480g) · Larger filter size (82mm vs 77mm) · Detachable lens hood 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	5	0
Advantages: 5 Disadvantages: 0 · Newer model (1994) · Wider focal range · Wider field of view at the shorter end · Slightly slower @ 35mm · Aspherical design · Slightly larger magnification (1:12 vs 1:12.5) · Much lighter (280g vs 480g) · Smaller (71.5mm vs 104.5mm) · Larger filter size (82mm vs 77mm) · Detachable lens hood HIDE
Tamron SP AF 20-40mm F/2.7-3.5 Aspherical [IF] 166D • ⌀77		1994 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (1994) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Slightly faster @ 20mm · Slightly faster @ 40mm · Aspherical design · No floating element system (but has internal focusing) · Slightly larger magnification (1:10.2 vs 1:12.5) · Smaller (81mm vs 104.5mm) · Detachable lens hood HIDE
Tamron SP AF 20-40mm F/2.7-3.5 Aspherical [IF] 266D • ⌀77		2000 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (2000) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Slightly faster @ 20mm · Slightly faster @ 40mm · Aspherical design · No floating element system (but has internal focusing) · Slightly larger magnification (1:10.2 vs 1:12.5) · Smaller (81mm vs 104.5mm) · Detachable lens hood HIDE
Tamron AF 19-35mm F/3.5-4.5 A10 • ⌀77		2002 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (2002) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system (but has internal focusing) · More diaphragm blades (8 vs 6) · Slightly larger magnification (1:12 vs 1:12.5) · Lighter (317g vs 480g) · Smaller (67.7mm vs 104.5mm) · Detachable lens hood HIDE
Tokina AF 19-35mm F/3.5-4.5 • ⌀77 akaQuantaray AF 19-35mm F/3.5-4.5		2000 ●	compare	2	0
Advantages: 2 Disadvantages: 0 · Newer model (2000) · Slightly wider focal range · Slightly wider field of view at the shorter end · Slightly slower @ 35mm · No floating element system (but has internal focusing) · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Slightly larger magnification (1:9.28 vs 1:12.5) · Slightly lighter (400g vs 480g) · Smaller (77mm vs 104.5mm) · Detachable lens hood HIDE
Tokina AT-X Pro AF 20-35mm F/2.8 • ⌀77	Pro	1998 ●	compare	3	1
Advantages: 3 Disadvantages: 1 · Newer model (1998) · Slightly wider focal range · Slightly wider field of view at the shorter end · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 35mm · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Slightly larger magnification (1:11.6 vs 1:12.5) · Features Focus Clutch Mechanism · Heavier (585g vs 480g) · Slightly smaller (85.5mm vs 104.5mm) · Detachable lens hood HIDE
Tokina AF 20-35mm F/3.5-4.5 II • ⌀77		1996 ●	compare	2	2
Advantages: 2 Disadvantages: 2 · Newer model (1996) · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Smaller (74.5mm vs 104.5mm) · Detachable lens hood HIDE
Tokina AF 20-35mm F/3.5-4.5 • ⌀72		1990 ●	compare	2	2
Advantages: 2 Disadvantages: 2 · Slightly wider focal range · Slightly wider field of view at the shorter end · Extends while zooming · Slightly slower @ 35mm · No floating element system · Slightly smaller closest focusing distance (0.40m vs 0.50m) · Smaller (68.1mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood HIDE

■Nikon F mount (1) · APS-C
Sigma 18-35mm F/1.8 DC HSM \| A • ⌀72		2013 ●	compare	9	1
Advantages: 9 Disadvantages: 1 · Newer model (2013) · In production · APS-C · Constant F/1.8 speed across the focal length range · Much faster @ 18mm · Much faster @ 35mm · Optimized for digital cameras · More complex optical design · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.3 vs 1:12.5) · Hyper Sonic Motor · Has focus mode selector (AF - MF) · Manual focus override in autofocus mode · Much heavier (810g vs 480g) · Slightly larger (121mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Sigma SA mount (2)
Sigma 20-40mm F/2.8 EX DG Aspherical IF • ⌀82	Pro	2001 ●	compare	6	2
Advantages: 6 Disadvantages: 2 · Newer model (2001) · Wider focal range · Slightly wider field of view at the shorter end · Slightly longer reach at the longer end · Extends while zooming · Constant F/2.8 speed across the focal length range · Slightly faster @ 20mm · Faster @ 40mm · Optimized for digital cameras · More complex optical design · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Smaller closest focusing distance (0.30m vs 0.50m) · Larger magnification (1:4.6 vs 1:12.5) · Features Focus Clutch Mechanism · Heavier (595g vs 480g) · Larger filter size (82mm vs 77mm) · Detachable lens hood 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	5	0
Advantages: 5 Disadvantages: 0 · Newer model (1994) · Wider focal range · Wider field of view at the shorter end · Slightly slower @ 35mm · Aspherical design · Slightly larger magnification (1:12 vs 1:12.5) · Much lighter (280g vs 480g) · Smaller (71.5mm vs 104.5mm) · Larger filter size (82mm vs 77mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE

■Sigma SA mount (1) · APS-C
Sigma 18-35mm F/1.8 DC HSM \| A • ⌀72		2013 ●	compare	9	1
Advantages: 9 Disadvantages: 1 · Newer model (2013) · In production · APS-C · Constant F/1.8 speed across the focal length range · Much faster @ 18mm · Much faster @ 35mm · Optimized for digital cameras · More complex optical design · Aspherical design · No floating element system (but has internal focusing) · More diaphragm blades (9 vs 6) · Smaller closest focusing distance (0.28m vs 0.50m) · Larger magnification (1:4.3 vs 1:12.5) · Hyper Sonic Motor · Manual focus override in autofocus mode · Much heavier (810g vs 480g) · Slightly larger (121mm vs 104.5mm) · Smaller filter size (72mm vs 77mm) · Detachable lens hood NOTE: Approximate weight and length were used for comparison purposes. HIDE