Sigma 20mm F/1.8 EX DG ASPH RF

Specifications01

MountCANON EF

Focal length20mm

Max aperturef/1.8

TypeWide · Prime

Release year2000

Weight500 g

Filter size82 mm

Physical length90 mm

Min focus distance0.2 m

Max magnification0.25

Aperture blades9

Optical elements13

Groups11

AutofocusYes

StabilizationNo

Aperture controlNone 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)

Lens hoodLH875-02 - Bayonet-type petal-shaped

TeleconvertersNot compatible

EraDigital era

Production statusDiscontinued

Additional Info02

Lens TypeUltra-wide angle prime lens

Summary02

Sigma 20mm f/1.8 wide-angle prime for Canon EF DSLRs, designed for low-light and general wide views with a fast maximum aperture. It uses a focal length of 20mm and mounts via Canon EF.

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Specifications from thelensdb

Where can this lens be adapted?

The Canon EF mount has a flange distance of 44 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work

Native lenses set the aperture, and often the focus, electronically. On a plain adapter they do not work. Use an electronic adapter made for this pair; for many pairs nobody makes one. Fully manual lenses are the exception.

Sony EAdapter · 26 mm
The camera mount (46.1 mm) is narrower than the lens mount (54 mm). A large rear element can darken the corners.
Canon RFAdapter · 24 mm
Nikon ZAdapter · 28 mm
Fujifilm XAdapter · 26.3 mm
L-MountAdapter · 24 mm
The camera mount (51.6 mm) is narrower than the lens mount (54 mm). A large rear element can darken the corners.
Micro Four ThirdsAdapter · 24.75 mm
Fujifilm G (GFX)Adapter · 17.3 mm
Covers full-frame: it can vignette on a medium format sensor.
Canon EF-MAdapter · 26 mm
Canon EFNative