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Samyang 20mm F1.8 ED AS UMC Sony/Minolta Alpha Review

Samyang 20mm F1.8 ED AS UMC

Main Features

  • 20mm Focal Range
  • F1.8 Max Aperture
  • Filter Thread: 77mm
  • Max Format: 35mm FF
  • Sony Alpha Mount
  • Weight: 497g.
  • Diameter: 83mm
  • Length: 88mm
  • Min Focus Distance:0.2m
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Samyang 20mm F1.8 Overview

Samyang 20mm F1.8 is a Manual Focus (MF) Ultra-Wideangle Prime lens with 35mm FF max sensor coverage and it is designed to be used with Sony Alpha mount cameras.

Lenses in Sony Alpha Mount with Same Focal and Aperture Range
Model Coverage Weight Focusing Street Price
Sigma 20mm F1.8 EX DG Aspherical RF Lens Sigma 20mm F1.8 EX DG Aspherical RF
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35mm FF 520gr AF Amazon B&H Photo

Lens Mount

Samyang 20mm F1.8 is compatible with cameras that have Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.

Samyang 20mm F1.8 is also available in Canon EF , Canon EF-M, Fujifilm X, Micro Four Thirds, Nikon F (FX), Pentax KAF, Samsung NX and Sony E mounts.

Focal Range

Samyang 20mm F1.8 has a fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 30mm.

Aperture

Samyang 20mm F1.8 has a max aperture of F1.8 and a minimum aperture of F22.

Optical Formula

Samyang 20mm F1.8's optical formula consists of 13 elements in 12 groups . Following special elements are used in this design:

  • Two aspherical
  • 3 ED elements
  • Ultra Multi Coating

Lens Hood

Samyang 20mm F1.8 comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.

Popular Comparisons of Samyang 20mm F1.8

Here is the eight most popular comparisons of Samyang 20mm F1.8 amongst Camera Decision readers.

Top Alternatives of Samyang 20mm F1.8 Lens
Model Coverage Weight Focusing Street Price
Samyang 14mm F2.8 IF ED MC Aspherical Lens Samyang 14mm F2.8 IF ED MC Aspherical
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35mm FF 552gr MF Amazon B&H Photo
Rokinon 24mm f1.4 Aspherical Lens Rokinon 24mm f1.4 Aspherical
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35mm FF 580gr MF Amazon B&H Photo
Rokinon T-S 24mm f3.5 ED AS UMC Lens Rokinon T-S 24mm f3.5 ED AS UMC
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35mm FF 680gr MF Amazon B&H Photo
Sony 20mm F2.8 Lens Sony 20mm F2.8
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35mm FF 285gr AF Amazon B&H Photo
Samyang 16mm f2.0 ED AS UMC CS Lens Samyang 16mm f2.0 ED AS UMC CS
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APS-C / DX 583gr MF Amazon B&H Photo
Sigma 24mm F1.8 EX DG Aspherical Macro Lens Sigma 24mm F1.8 EX DG Aspherical Macro
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35mm FF 485gr AF Amazon B&H Photo
Samyang T-S 24mm f3.5 ED AS UMC Lens Samyang T-S 24mm f3.5 ED AS UMC
Compare
35mm FF 680gr MF Amazon B&H Photo
Samyang 24mm f1.4 ED AS UMC Lens Samyang 24mm f1.4 ED AS UMC
Compare
35mm FF 580gr MF Amazon B&H Photo

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**This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Pros and Cons of Samyang 20mm F1.8 ED AS UMC


PROs
Hood supplied
Full-time Manual Focusing
Fast Aperture
Covers Full-Frame Sensor

CONs
No Weather Sealing
No Autofocus
Samyang 20mm F1.8 ED AS UMC Alternatives in Sony Alpha Mount
Model Coverage Weight Focusing Street Price
Sony 16mm F2.8 Fisheye Lens Sony 16mm F2.8 Fisheye
Compare
35mm FF 400gr AF Amazon B&H Photo
Sony 20mm F2.8 Lens Sony 20mm F2.8
Compare
35mm FF 285gr AF Amazon B&H Photo
Sony 24mm F2 SSM Carl Zeiss Distagon T Lens Sony 24mm F2 SSM Carl Zeiss Distagon T
Compare
35mm FF 555gr AF Amazon B&H Photo
Samyang 16mm f2.0 ED AS UMC CS Lens Samyang 16mm f2.0 ED AS UMC CS
Compare
APS-C / DX 583gr MF Amazon B&H Photo
Samyang 24mm f1.4 ED AS UMC Lens Samyang 24mm f1.4 ED AS UMC
Compare
35mm FF 580gr MF Amazon B&H Photo
Samyang T-S 24mm f3.5 ED AS UMC Lens Samyang T-S 24mm f3.5 ED AS UMC
Compare
35mm FF 680gr MF Amazon B&H Photo
Sigma 20mm F1.8 EX DG Aspherical RF Lens Sigma 20mm F1.8 EX DG Aspherical RF
Compare
35mm FF 520gr AF Amazon B&H Photo
Sigma 24mm F1.8 EX DG Aspherical Macro Lens Sigma 24mm F1.8 EX DG Aspherical Macro
Compare
35mm FF 485gr AF Amazon B&H Photo
Rokinon 24mm f1.4 Aspherical Lens Rokinon 24mm f1.4 Aspherical
Compare
35mm FF 580gr MF Amazon B&H Photo
Rokinon T-S 24mm f3.5 ED AS UMC Lens Rokinon T-S 24mm f3.5 ED AS UMC
Compare
35mm FF 680gr MF Amazon B&H Photo

Samyang 20mm F1.8 Detailed Specifications


General
Brand Samyang
Lens Type Prime
Lens Type Wideangle Prime
Lens Mount Sony Alpha
Max Format 35mm FF
Focal Range 20mm
Image Stabilization
Colour Unknown
Zoom Method No Zoom
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 1.0X
APERTURE
Max Aperture F1.8
Min Aperture F22
Aperture Ring Yes
Diaphragm Blades 7
Optics
Optical Elements 13
Optical Groups 12
Special Elements Two aspherical + 3 ED elements, Ultra Multi Coating

FOCUSING
Min Focus Distance 0.2m
Max Magnification unknown
Autofocus No
AF Motor Type No AF
Full Time Manual Yes
Focus Method Internal
Distance Scale Yes
PHYSICAL SPECS
Weight 497g
Diameter 83mm
Length 88mm
Weather Sealing No
Filter Thread 77mm
Filter Notes -
Hood Supplied Yes
Tripod Collar No
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Frequently Asked Questions about Samyang 20mm F1.8 ED AS UMC
is the Samyang 20mm F1.8 ED AS UMC a Weather Sealed lens?
What is the Minimum Focusing Distance of Samyang 20mm F1.8 ED AS UMC
is the Samyang 20mm F1.8 ED AS UMC an Autofocus (AF) lens?
What is the Filter Thread Size of Samyang 20mm F1.8 ED AS UMC
Does Samyang 20mm F1.8 ED AS UMC have Image Stabilization?
Does Samyang 20mm F1.8 ED AS UMC have Aperture Ring?
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