Sigma 28mm F/1.8 EX DG Aspherical Macro
Wide-angle prime lens • Digital era • Discontinued
Abbreviations
EX | 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. |
DG | The lens is designed for 35mm digital cameras but can be also used on APS-C digital cameras. |
MACRO | A lens with better close-up focusing capabilities in comparison with traditional lenses. Not a macro lens though. |
Model history (3)
■Sigma High-Speed Wide 28mm F/1.8 Aspherical ZEN | A | 9 - 8 | 0.30m | ⌀58 | 1990 ● | |
■Sigma High-Speed Wide 28mm F/1.8 Aspherical II ZEN | A | 9 - 8 | 0.30m | ⌀58 | 1994 ● | |
■Sigma 28mm F/1.8 EX DG Aspherical Macro | A | 10 - 9 | 0.20m | ⌀77 | 2000 ● |
Specification
Optical design: | |
35mm full frame | |
28mm | |
F/1.8 | |
10 elements in 9 groups | |
2 ASPH | |
Floating element system | |
Canon EF [44mm] | |
Minolta/Sony A [44.5mm] | |
Nikon F [46.5mm] | |
Pentax K [45.5mm] | |
Sigma SA [44mm] | |
75.4° (35mm full frame) | |
On Canon EOS APS-C [1.59x] cameras: | |
35mm equivalent focal length: | 44.5mm (in terms of field of view) |
35mm equivalent speed: | F/2.9 (in terms of depth of field) |
Diagonal angle of view: | 51.8° |
On Sony DSLR-A/SLT-A APS-C [1.53x] cameras: | |
35mm equivalent focal length: | 42.8mm (in terms of field of view) |
35mm equivalent speed: | F/2.8 (in terms of depth of field) |
Diagonal angle of view: | 53.6° |
On Nikon D APS-C [1.53x] cameras: | |
35mm equivalent focal length: | 42.8mm (in terms of field of view) |
35mm equivalent speed: | F/2.8 (in terms of depth of field) |
Diagonal angle of view: | 53.6° |
On Pentax K APS-C [1.53x] cameras: | |
35mm equivalent focal length: | 42.8mm (in terms of field of view) |
35mm equivalent speed: | F/2.8 (in terms of depth of field) |
Diagonal angle of view: | 53.6° |
On Sigma SD APS-C [1.74x] cameras: | |
35mm equivalent focal length: | 48.7mm (in terms of field of view) |
35mm equivalent speed: | F/3.1 (in terms of depth of field) |
Diagonal angle of view: | 47.9° |
Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | None; the aperture is controlled from the camera (Canon EF, Minolta/Sony A, Sigma SA) |
Aperture ring (Manual settings + Auto Exposure setting) (Nikon F, Pentax K) | |
9 (nine) | |
Focusing: | |
0.20m | |
1:2.9 | |
Focusing modes: | Autofocus (A), Manual focus (M) |
Autofocus motor: | Micromotor (Canon EF, Sigma SA) |
In-camera motor (Nikon F, Pentax K, Minolta/Sony A) | |
Manual focus control: | Focusing ring |
Focus mode selector: | Sigma Dual Focus System (Canon EF, Sigma SA) |
Focus Clutch Mechanism (Nikon F, Pentax K, Minolta/Sony A) | |
Manual focus override in autofocus mode: | - |
Optical Stabilizer (OS): | |
- | |
Physical characteristics: | |
480g (Nikon F) | |
⌀83.6×80mm (Nikon F) | |
- | |
- | |
Accessories: | |
Screw-type 77mm | |
LH825-03 - Bayonet-type petal-shaped | |
Not compatible |
Source of data
- Manufacturer's technical data.
Manufacturer description
This lens has a macro focusing capability with fast ƒ/1.8 maximum aperture, which is ideal for Digital SLR cameras.
This lens is capable of macro photography with a minimum shooting distance of 20cm (7.8 in.) and a maximum reproduction ratio of 1:2.9.
The lens has an advanced optical construction, in order to obtain adequate peripheral brightness when wide-open. Also, the iris diaphragm has 9 blades to obtain beautiful out of focus images in the foreground and background.
The lens incorporates a Dual-Focus (DF) mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens. Also, this also allows the use of a Petal-type Hood and the easy use of a polarizing filter.
It incorporates a floating focus system and uses two aspherical lens elements for minimizing distortion, aberration and astigmatism.
Notes
- The autofocus will not be available with Nikon D40, D40X, D60, D3000-D3500, D5000-D5600 digital SLR cameras.