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Samyang 50mm F1.4 AS UMC KAF Mount 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 / 1.18 lb
  • Dimensions(øxL): 82mm x 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 Fixed aperture Manual Focus (MF) Standard Prime lens with 35mm FF max sensor coverage, and it is designed to be used with 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.

What type of photography is the Samyang 50mm F1.4 AS UMC lens good for?

The type of photography that you are planning to use the Samyang 50mm F1.4 AS UMC is an important decision factor. Here we have evaluated its suitability to various photography scenarios:

Photography Type Suitability
Bird/WildlifeFair
SportsAverage
PortraitExcellent
TravelGood
StreetVery Good
WeddingExcellent
Walk AroundGood
VloggingGood
LandscapeGood
Macro

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
Compare
35mm FF 910gr AF Amazon B&H Photo
smc Pentax-FA 50mm F1.4 Classic Lens smc Pentax-FA 50mm F1.4 Classic
Compare
35mm FF 216gr AF Amazon B&H Photo
HD Pentax-FA 50mm F1.4 Lens HD Pentax-FA 50mm F1.4
Compare
35mm FF 223gr AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
Compare
35mm FF 220gr AF Amazon B&H Photo
Carl Zeiss Planar T1.4 50 Lens Carl Zeiss Planar T1.4 50
Compare
35mm FF 350gr 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

Reasons to Buy Samyang 50mm F1.4 AS UMC Lens

Here we've included a summary of the advantages and disadvantages of the Samyang 50mm F1.4 AS UMC lens in a list form to help you determine whether it offers the features you need.

PROs
Aperture Ring
Distance Scale
DoF(Depth of Field) Scale
Hood supplied
Full-time Manual Focusing
Very Fast Aperture
Covers Full-Frame Sensor
8 Diaphragm Blades for Smooth Bokeh
Report a correction

Buy Samyang 50mm F1.4 AS UMC from Amazon or B&H PHOTO


CONs
No Weather Sealing
No Autofocus


Lens Mount

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

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

Size, Weight and Filter Thread

Size and weight is a very important decision factor when searching for your next lens. Samyang 50mm F1.4 AS UMC has a maximum diameter of 82mm and total length of 75mm. It weighs 535g / 18.9 oz.

Samyang 50mm F1.4 AS UMC has a filter thread of 77mm. Below are links to the filters that we recommend you to consider for your Samyang 50mm F1.4 AS UMC:

  • 77mm Variable ND Lens Filters
  • 77mm Circular Polarizer Lens Filters
  • 77mm Clear Protection Lens Filters




Focal Range

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


Below are the 3 Standard Prime type Pentax KAF mount lens alternatives with highest max magnification ratios:

  • Pentax 35mm F2.4 AL: 0.17x - (Compare)
  • Pentax DA 55mm F1.4 SDM: 0.17x - (Compare)
  • HD Pentax-FA 35mm F2 AL: 0.17x - (Compare)

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 are the eight most popular comparisons of the 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
Compare
35mm FF 122 g / 0.27 lb AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
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35mm FF 220 g / 0.48 lb AF Amazon B&H Photo
Carl Zeiss Planar T1.4 50 Lens Carl Zeiss Planar T1.4 50
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35mm FF 350 g / 0.77 lb 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 320 g / 0.70 lb MF Amazon B&H Photo
HD Pentax-D FA 50mm F1.4 SDM AW Lens HD Pentax-D FA 50mm F1.4 SDM AW
Compare
35mm FF 910 g / 2.00 lb AF Amazon B&H Photo
Pentax smc D-FA 50mm F2.8 Macro Lens Pentax smc D-FA 50mm F2.8 Macro
Compare
35mm FF 265 g / 0.58 lb AF Amazon B&H Photo
Lensbaby Sol 45 DSLR Lens Lensbaby Sol 45 DSLR
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35mm FF 144 g / 0.32 lb MF Amazon B&H Photo
Sigma 50mm F1.4 EX DG HSM Lens Sigma 50mm F1.4 EX DG HSM
Compare
35mm FF 505 g / 1.11 lb AF Amazon B&H Photo


**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.

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
Compare
35mm FF 910 g / 2.00 lb AF Amazon B&H Photo
smc Pentax-FA 50mm F1.4 Classic Lens smc Pentax-FA 50mm F1.4 Classic
Compare
35mm FF 216 g / 0.48 lb AF Amazon B&H Photo
HD Pentax-FA 50mm F1.4 Lens HD Pentax-FA 50mm F1.4
Compare
35mm FF 223 g / 0.49 lb AF Amazon B&H Photo
HD Pentax-FA 43mm F1.9 Limited Lens HD Pentax-FA 43mm F1.9 Limited
Compare
35mm FF 155 g / 0.34 lb AF Amazon B&H Photo
Pentax smc D-FA 50mm F2.8 Macro Lens Pentax smc D-FA 50mm F2.8 Macro
Compare
35mm FF 265 g / 0.58 lb AF Amazon B&H Photo
HD Pentax DA 35mm F2.8 Macro Limited Lens HD Pentax DA 35mm F2.8 Macro Limited
Compare
APS-C / DX 214 g / 0.47 lb AF Amazon B&H Photo
HD Pentax DA 40mm F2.8 Limited Lens HD Pentax DA 40mm F2.8 Limited
Compare
APS-C / DX 80 g / 0.18 lb AF Amazon B&H Photo
HD Pentax DA 70mm F2.4 AL Limited Lens HD Pentax DA 70mm F2.4 AL Limited
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APS-C / DX 147 g / 0.32 lb AF Amazon B&H Photo
Pentax smc DA 35mm F2.4 AL Lens Pentax smc DA 35mm F2.4 AL
Compare
APS-C / DX 124 g / 0.27 lb AF Amazon B&H Photo
Pentax smc DA 35mm F2.8 Macro Limited Lens Pentax smc DA 35mm F2.8 Macro Limited
Compare
APS-C / DX 215 g / 0.47 lb AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 Limited Lens Pentax smc DA 40mm F2.8 Limited
Compare
APS-C / DX 90 g / 0.20 lb AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 XS Lens Lens Pentax smc DA 40mm F2.8 XS Lens
Compare
APS-C / DX 45 g / 0.10 lb AF Amazon B&H Photo
Pentax smc DA 50mm F1.8 Lens Pentax smc DA 50mm F1.8
Compare
35mm FF 122 g / 0.27 lb AF Amazon B&H Photo
Pentax smc DA 70mm F2.4 AL Limited Lens Pentax smc DA 70mm F2.4 AL Limited
Compare
APS-C / DX 130 g / 0.29 lb 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 375 g / 0.83 lb 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 155 g / 0.34 lb AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
Compare
35mm FF 220 g / 0.48 lb AF Amazon B&H Photo
HD Pentax-FA 35mm F2 AL Lens HD Pentax-FA 35mm F2 AL
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APS-C / DX 193 g / 0.42 lb AF Amazon B&H Photo
Samsung D-Xenon 35mm F2 AL Lens Samsung D-Xenon 35mm F2 AL
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35mm FF 195 g / 0.43 lb AF Amazon B&H Photo
Sigma 50mm F2.8 EX DG Macro Lens Sigma 50mm F2.8 EX DG Macro
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35mm FF 320 g / 0.70 lb AF Amazon B&H Photo
Sigma 70mm F2.8 EX DG Macro Lens Sigma 70mm F2.8 EX DG Macro
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35mm FF 527 g / 1.16 lb AF Amazon B&H Photo
Samyang 35mm F1.4 AS UMC Lens Samyang 35mm F1.4 AS UMC
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35mm FF 660 g / 1.45 lb MF Amazon B&H Photo
Voigtlander 40mm F2 Ultron SL II Lens Voigtlander 40mm F2 Ultron SL II
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35mm FF 200 g / 0.44 lb 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 320 g / 0.70 lb 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 1400 g / 3.08 lb MF Amazon B&H Photo
Irix 45mm F1.4 Lens Irix 45mm F1.4
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35mm FF 925 g / 2.04 lb MF Amazon B&H Photo
Lensbaby Burnside 35 Lens Lensbaby Burnside 35
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35mm FF 374 g / 0.82 lb MF Amazon B&H Photo
Carl Zeiss Distagon T 235 Lens Carl Zeiss Distagon T 235
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35mm FF 570 g / 1.25 lb MF Amazon B&H Photo
Carl Zeiss Makro-Planar T 250 Lens Carl Zeiss Makro-Planar T 250
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35mm FF 530 g / 1.17 lb MF Amazon B&H Photo
Carl Zeiss Planar T1.4 50 Lens Carl Zeiss Planar T1.4 50
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35mm FF 350 g / 0.77 lb MF Amazon B&H Photo
Lensbaby Velvet 56 Lens Lensbaby Velvet 56
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35mm FF 400 g / 0.88 lb MF Amazon B&H Photo
Hartblei Superrotator 40mm F4 IF TS Lens Hartblei Superrotator 40mm F4 IF TS
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35mm FF 1550 g / 3.41 lb MF Amazon B&H Photo
Lensbaby Sol 45 DSLR Lens Lensbaby Sol 45 DSLR
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35mm FF 144 g / 0.32 lb MF Amazon B&H Photo
Rokinon 35mm f1.4 Lens Rokinon 35mm f1.4
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35mm FF 660 g / 1.45 lb MF Amazon B&H Photo
Sigma 35mm F1.4 DG HSM Lens Sigma 35mm F1.4 DG HSM
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35mm FF 665 g / 1.46 lb AF Amazon B&H Photo
Sigma 50mm F1.4 EX DG HSM Lens Sigma 50mm F1.4 EX DG HSM
Compare
35mm FF 505 g / 1.11 lb AF Amazon B&H Photo

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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?


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