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Samyang 50mm F1.4 AS UMC Pentax KAF Review

Samyang 50mm F1.4 AS UMC

Main Features

  • 50mm Focal Range
  • F1.4 Max Aperture
  • Filter Thread: 77mm
  • Max Format: 35mm FF
  • Pentax KAF Mount
  • Weight: 535g.
  • Diameter: 82mm
  • Length: 75mm
  • Min Focus Distance:0.45m
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Samyang 50mm F1.4 AS UMC Overview

Samyang 50mm F1.4 AS UMC is a Manual Focus (MF) Standard Prime lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF mount cameras. Samyang 50mm F1.4 AS UMC is also sold under the Rokinon 50mm F1.4 AS IF UMC name in some countries.

Lenses in Pentax KAF Mount with Same Focal and Aperture Range
Model Coverage Weight Focusing Street Price
HD Pentax-D FA 50mm F1.4 SDM AW Lens HD Pentax-D FA 50mm F1.4 SDM AW
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35mm FF 910gr AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
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35mm FF 220gr AF Amazon B&H Photo
Carl Zeiss Planar T1.4 50 Lens Carl Zeiss Planar T1.4 50
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35mm FF 350gr MF Amazon B&H Photo
Sigma 50mm F1.4 EX DG HSM Lens Sigma 50mm F1.4 EX DG HSM
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35mm FF 505gr AF Amazon B&H Photo

Lens Mount

Samyang 50mm F1.4 AS UMC is compatible with cameras that have Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III, Pentax K-1 II and Pentax KP.

Samyang 50mm F1.4 AS UMC is also available in Canon EF , Nikon F (FX), Sony Alpha and Sony E mounts.

Focal Range

Samyang 50mm F1.4 AS UMC has a fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 75mm.

Aperture

Samyang 50mm F1.4 AS UMC has a max aperture of F1.4 and a minimum aperture of F22.

Optical Formula

Samyang 50mm F1.4 AS UMC's optical formula consists of 9 elements in 6 groups . Following special elements are used in this design:

  • 1 hybrid + 1 aspherical element
  • Ultra Multi Coating

Lens Hood

Samyang 50mm F1.4 AS UMC comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.

Popular Comparisons of Samyang 50mm F1.4 AS UMC

Here is the eight most popular comparisons of Samyang 50mm F1.4 AS UMC amongst Camera Decision readers.

Top Alternatives of Samyang 50mm F1.4 AS UMC Lens
Model Coverage Weight Focusing Street Price
Pentax smc DA 50mm F1.8 Lens Pentax smc DA 50mm F1.8
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35mm FF 122gr AF Amazon B&H Photo
HD Pentax-D FA 50mm F1.4 SDM AW Lens HD Pentax-D FA 50mm F1.4 SDM AW
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35mm FF 910gr AF Amazon B&H Photo
Voigtlander 58mm F1.4 Nokton SL II Lens Voigtlander 58mm F1.4 Nokton SL II
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35mm FF 320gr MF Amazon B&H Photo
Pentax smc D-FA 50mm F2.8 Macro Lens Pentax smc D-FA 50mm F2.8 Macro
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35mm FF 265gr AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
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35mm FF 220gr AF Amazon B&H Photo
Lensbaby Velvet 56 Lens Lensbaby Velvet 56
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35mm FF 400gr MF Amazon B&H Photo
Lensbaby Sol 45 DSLR Lens Lensbaby Sol 45 DSLR
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35mm FF 144gr MF Amazon B&H Photo
Carl Zeiss Planar T1.4 50 Lens Carl Zeiss Planar T1.4 50
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35mm FF 350gr MF Amazon B&H Photo

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Pros and Cons of Samyang 50mm F1.4 AS UMC


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

CONs
No Weather Sealing
No Autofocus
Samyang 50mm F1.4 AS UMC Alternatives in Pentax KAF Mount
Model Coverage Weight Focusing Street Price
HD Pentax-D FA 50mm F1.4 SDM AW Lens HD Pentax-D FA 50mm F1.4 SDM AW
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35mm FF 910gr AF Amazon B&H Photo
Irix 45mm F1.4 Lens Irix 45mm F1.4
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35mm FF 925gr MF Amazon B&H Photo
HD Pentax-FA 43mm F1.9 Limited Lens HD Pentax-FA 43mm F1.9 Limited
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35mm FF 155gr AF Amazon B&H Photo
Pentax smc D-FA 50mm F2.8 Macro Lens Pentax smc D-FA 50mm F2.8 Macro
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35mm FF 265gr AF Amazon B&H Photo
HD Pentax DA 40mm F2.8 Limited Lens HD Pentax DA 40mm F2.8 Limited
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APS-C / DX 80gr AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 Limited Lens Pentax smc DA 40mm F2.8 Limited
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APS-C / DX 90gr AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 XS Lens Lens Pentax smc DA 40mm F2.8 XS Lens
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APS-C / DX 45gr AF Amazon B&H Photo
Pentax smc DA 50mm F1.8 Lens Pentax smc DA 50mm F1.8
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35mm FF 122gr AF Amazon B&H Photo
Pentax smc DA 55mm F1.4 SDM Lens Pentax smc DA 55mm F1.4 SDM
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APS-C / DX 375gr AF Amazon B&H Photo
Pentax smc FA 43mm F1.9 Limited Lens Pentax smc FA 43mm F1.9 Limited
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35mm FF 155gr AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
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35mm FF 220gr AF Amazon B&H Photo
Sigma 50mm F2.8 EX DG Macro Lens Sigma 50mm F2.8 EX DG Macro
Compare
35mm FF 320gr AF Amazon B&H Photo
Voigtlander 40mm F2 Ultron SL II Lens Voigtlander 40mm F2 Ultron SL II
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35mm FF 200gr MF Amazon B&H Photo
Voigtlander 58mm F1.4 Nokton SL II Lens Voigtlander 58mm F1.4 Nokton SL II
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35mm FF 320gr MF Amazon B&H Photo
Schneider PC-TS Super-Angulon 2.850 HM Lens Schneider PC-TS Super-Angulon 2.850 HM
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35mm FF 1400gr MF Amazon B&H Photo
Carl Zeiss Makro-Planar T 250 Lens Carl Zeiss Makro-Planar T 250
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35mm FF 530gr MF Amazon B&H Photo
Carl Zeiss Planar T1.4 50 Lens Carl Zeiss Planar T1.4 50
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35mm FF 350gr MF Amazon B&H Photo
Lensbaby Velvet 56 Lens Lensbaby Velvet 56
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35mm FF 400gr MF Amazon B&H Photo
Hartblei Superrotator 40mm F4 IF TS Lens Hartblei Superrotator 40mm F4 IF TS
Compare
35mm FF 1550gr MF Amazon B&H Photo
Lensbaby Sol 45 DSLR Lens Lensbaby Sol 45 DSLR
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35mm FF 144gr MF Amazon B&H Photo
Sigma 50mm F1.4 EX DG HSM Lens Sigma 50mm F1.4 EX DG HSM
Compare
35mm FF 505gr AF Amazon B&H Photo

Samyang 50mm F1.4 AS UMC Detailed Specifications


General
Brand Samyang
Lens Type Prime
Lens Type Standard Prime
Lens Mount Pentax KAF
Max Format 35mm FF
Focal Range 50mm
Image Stabilization
Colour Unknown
Zoom Method No Zoom
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 1.0X
APERTURE
Max Aperture F1.4
Min Aperture F22
Aperture Ring Yes
Diaphragm Blades 8
Optics
Optical Elements 9
Optical Groups 6
Special Elements 1 hybrid + 1 aspherical element, Ultra Multi Coating

FOCUSING
Min Focus Distance 0.45m
Max Magnification unknown
Autofocus No
AF Motor Type No AF
Full Time Manual Yes
Focus Method Internal
Distance Scale Yes
DoF Scale Yes
PHYSICAL SPECS
Weight 535g
Diameter 82mm
Length 75mm
Weather Sealing No
Filter Thread 77mm
Filter Notes -
Hood Supplied Yes
Tripod Collar No
Report a Correction
Frequently Asked Questions about Samyang 50mm F1.4 AS UMC
is the Samyang 50mm F1.4 AS UMC a Weather Sealed lens?
What is the Minimum Focusing Distance of Samyang 50mm F1.4 AS UMC
is the Samyang 50mm F1.4 AS UMC an Autofocus (AF) lens?
What is the Filter Thread Size of Samyang 50mm F1.4 AS UMC
Does Samyang 50mm F1.4 AS UMC have Image Stabilization?
Does Samyang 50mm F1.4 AS UMC have Aperture Ring?
FOLLOW US


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