Michael Topham samples Samyang’s latest manual-focus prime lens, which is designed 
with today’s mirrorless users in mind

Product Overview

Overall rating:

Samyang 21mm 
f/1.4 ED AS UMC CS

Product:

Samyang 21mm 
f/1.4 ED AS UMC CS review

Manufacturer:

Price as reviewed:

£279.00

Samyang 21mm 
f/1.4 ED AS UMC CS review: Image quality

The lens backs up its robust build with impressive image quality. The edges of images appear very slightly softer than the centre 
at f/1.4, but there’s an increase in sharpness, both in the centre and at the edge, at f/2 and f/2.8 to where it plateaus between f/3.5 and f/5.6. The best balance between centre and corner sharpness is recorded at f/5.6, and it’s only when the lens is stopped down beyond f/11 to the smaller apertures of f/16 and f/22 that the introduction of diffraction starts to take its toll on sharpness.

Samyang 21mm 
f:1.4 ED AS UMC CS review sample image

To achieve pin-sharp results, you’ll want to put your camera’s manual focus assist settings to good use. For this shot, focus peaking and a magnified screen view were used

Corner shading is apparent when the lens is used at its widest aperture, but it quickly starts to disappear when the lens is closed towards f/2.8. Our distortion chart flagged up minor barrel distortion, but as my real-world images revealed you’d be hard pressed to notice 
it and therefore it shouldn’t be of concern. Chromatic aberrations are well controlled 
too, with only minor purple fringes of colour appearing along high-contrast edges when shooting towards the sun.

Samyang 21mm 
f:1.4 ED AS UMC CS review sample image

Our review sample was supplied in X-mount and was paired with Fujifilm’s X-T10 for this review

  1. 1. Samyang 21mm 
f/1.4 ED AS UMC CS review: Introduction
  2. 2. Samyang 21mm 
f/1.4 ED AS UMC CS review: Features
  3. 3. Samyang 21mm 
f/1.4 ED AS UMC CS review: Build and handling
  4. 4. Samyang 21mm 
f/1.4 ED AS UMC CS review: Image quality
  5. 5. Samyang 21mm 
f/1.4 ED AS UMC CS review: Resolution, shading and curvilinear distortion
  6. 6. Samyang 21mm 
f/1.4 ED AS UMC CS review:  Verdict
  7. 7. Page 7
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