Sigma 20mm F1.8 EX DG ASP RF Lens
For Nikon F Mount
The Sigma 20mm F1.8 EX DG ASP RF is an ultra-wide prime designed for cameras with a Full-Frame sensor. This ultra-bright prime has a 20mm focal-length.
This prime can focus down to 20cm from the imaging plane which gives it a maximum magnification of 0.25X. The lens supports autofocus and features a switch to disengage AF for focusing manually. A built-in focus motor is used to set the focus-distance. It allowed Sigma to optimize the motor precisely for this lens in order to maximize performance.
This version has a Nikon F lens mount. Follow this link for all current compatible digital cameras: Nikon F mount cameras with Full-Frame or smaller sensors. Sigma also made this lens available for Canon EF, Pentax K, Sony A, Sigma S mounts.
Sigma 20mm F1.8 EX DG ASP RF Specifications
|Brand||Sigma||Model||20mm F1.8 EX DG ASP RF|
|Focal Length||20mm||View Angle||94°|
|Max Aperture||F/1.8||Min Aperture||F/22|
|Filter Size||82mm||Aperture Blades||9|
|Size (D x L)||89 x 87mm||Weight||520g|
|Tilt||N / A||Shift||N / A|
|Zoom Drive||N / A||Focus Drive||AF with MF Switch|
|Zoom Mechanism||N / A||Focus Mechanism||Internal|
Similar Lenses For Nikon F Mount
Here are the newest lenses matching or exceeding major specifications of the Sigma 20mm F1.8 EX DG ASP RF. They cover the same focal-range with a similar aperture and are available for the same lens mount and imaging circle coverage.
ZY Optics Mitakon Creator 20mm F/2
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Sigma A 20mm F/1.4 DG HSM
Nikkor AF-S 24mm F/1.8G ED
Sigma A 24mm F/1.4 DG HSM
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Sigma 20mm F/1.8 Facts
|20mm Focal-Length||F/1.8 Constant Aperture|
|82mm Filter Thread||AF with MF Switch|
|Nikon F Mount||1 Max Crop-Factor|
|520g Lens Weight||89 x 87mm (D x L)|
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