Sigma 20mm F1.8 EX DG Aspherical RF Overview
Wideangle prime lens | Canon EF, Nikon F (FX), Pentax KAF, Sigma SA Bayonet, Sony/Minolta Alpha
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Product description
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Manufacturer description: The Sigma 20mm F1.8 EX DG Aspherical Macro is a standard wide-angle lens for full-frame and APS-C digital SLRs. Although not a new lens, it remains popular for its combination of good build quality, a usefully fast aperture of F1.8 and decent optics. You don't get Sigma's HSM ultrasonic-type autofocus motor but a clever manual/auto focus clutch gives quick access to manual focus if you need to fine-tune.
Product timeline
Dec 15, 2014
Quick specs
| Lens type | Prime lens |
| Focal length | 20 mm |
| Image stab. | No |
| Lens mount | Canon EF, Nikon F (FX), Pentax KAF, Sigma SA Bayonet, Sony/Minolta Alpha |
| Max aperture | F1.8 |
| Min aperture | F22 |
| Min focus | 0.20 m (7.87″) |
| Weight | 520 g (1.15 lb) |
| Length | 90 mm (3.52″) |
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