Samyang Micro Four Thirds Prime

21mm f/1.4 ED AS UMC CS

21mm
f/1.4
Prime
Min focus 0.28 m

Quick answer

The Samyang 21mm f/1.4 ED AS UMC CS is a ultra-wide prime lens covering 21mm at f/1.4 for the Micro Four Thirds mount. Its very wide maximum aperture suits low light and shallow depth of field with strong background blur.

About this lens

The Samyang 21mm f/1.4 ED AS UMC CS is a fast wide-angle prime lens covering 21mm at f/1.4 for Micro Four Thirds mount cameras, with extra-low dispersion glass and aspherical elements. The wide view suits landscapes, architecture and environmental shots.

Samyang 21mm f/1.4 ED AS UMC CS specifications

Brand: Samyang
Mount: Micro Four Thirds
Focal length: 21mm
Maximum aperture: f/1.4
Lens type: Prime
Optical construction: 8 elements in 7 groups
Minimum focus distance: 0.28 m
Filter thread: 58 mm

Specification source: lksamyang.com

What can you shoot with the Samyang 21mm f/1.4 ED AS UMC CS?

At 21mm this is a ultra-wide prime, which typically suits:

Landscapes and big skies
Architecture and interiors
Astrophotography and night skies

Its very wide maximum aperture suits low light and shallow depth of field with strong background blur.

Full-frame equivalent and field of view

Calculated from the focal length and crop factor. Not measured.

Sensor	Crop	Equivalent	Horizontal FOV	Diagonal FOV
Micro Four Thirds	2.0x	42mm	46.4°	54.5°

Try the field-of-view calculator

Frequently asked questions

What mount does the Samyang 21mm f/1.4 ED AS UMC CS use?

It uses the Micro Four Thirds mount, so it fits Micro Four Thirds cameras directly.

What is the focal length of the Samyang 21mm f/1.4 ED AS UMC CS?

It is a fixed 21mm lens with a maximum aperture of f/1.4. That makes it a ultra-wide lens.

Is the Samyang 21mm f/1.4 ED AS UMC CS a prime or a zoom lens?

It is a prime lens with a fixed 21mm focal length. Primes usually open wider than zooms; this one opens to f/1.4.

What is the Samyang 21mm f/1.4 ED AS UMC CS equivalent on a crop sensor?

On Micro Four Thirds (2x crop) it frames like 42mm on full frame, with a 46.4° horizontal and 54.5° diagonal field of view. These figures are calculated from the focal length and crop factor.

Which cameras does the Samyang 21mm f/1.4 ED AS UMC CS fit?

Any Micro Four Thirds-mount camera, including OM System OM-1, OM System OM-1 Mark II, OM System OM-5, Olympus OM-D E-M1, and Olympus OM-D E-M1 Mark II and 24 more.