N°90154 · Family detail
SamyangWide·CANON EF mount·2016
Samyang 20mm F/1.8 ED AS UMC
Specifications01
MountCANON EF
Focal length20mm
Max aperturef/1.8
TypeWide · Prime
Release year2016
Weight497 g
Filter size77 mm
Physical length88 mm
Min focus distance0.2 m
Aperture blades7
Optical elements13
Groups12
AutofocusNo
StabilizationNo
Aperture controlAperture ring
Lens hoodBayonet-type petal-shaped
TeleconvertersNot available
EraDigital era
Additional Info02
Lens TypeUltra-wide angle prime lens
Summary02
Samyang 20mm f/1.8 ED AS UMC is a wide-angle prime lens for Canon EF mount, suited for landscape, architecture, and low-light work due to its wide maximum aperture.
AI-assisted summary — verify against linked sourcesWhere 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
No plain adapter reaches infinity focus on: Nikon F.

Other Mounts03
This lens family is also indexed in 11 other mounts.
CANON EF-MView lens
Samyang 20mm F/1.8 ED AS UMC
CANON EF-SView lens
Samyang 20mm F/1.8 ED AS UMC
FUJIFILM X2 entries
Samyang 20mm F/1.8 ED AS UMC
MICRO 4/3View lens
Samyang 20mm F/1.8 ED AS UMC
MINOLTA/SONY AView lens
Samyang 20mm F/1.8 ED AS UMC
NIKON FView lens
Samyang 20mm F/1.8 ED AS UMC
NIKON F DXView lens
Samyang 20mm F/1.8 ED AS UMC
PENTAX KView lens
Samyang 20mm F/1.8 ED AS UMC
SAMSUNG NXView lens
Samyang 20mm F/1.8 ED AS UMC
SONY EView lens
Samyang 20mm F/1.8 ED AS UMC
SONY FEView lens
Samyang 20mm F/1.8 ED AS UMC