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Rokinon 50mm f/1.4 AS IF UMC Lens for Pentax K Mount

BH #RO5014P • MFR #50M-P
Rokinon 50mm f/1.4 AS IF UMC Lens for Pentax K Mount
Key Features
  • Pentax K Mount/Full-Frame Format
  • Aperture Range: f/1.4 to 22
  • One Hybrid and One Aspherical Element
  • Ultra Multi-Coating Lens Coat
The 50mm f/1.4 AS IF UMC Lens for Pentax K Mount from Rokinon offers a standard 50mm focal length in the full frame format and a very fast f/1.4 maximum aperture for effective low light shooting, fast shutter speed capture, and shallow depth of field control. When used on cameras with an APS-C format sensor its 35mm focal length equivalence is 75mm. 
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$299.00
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Rokinon 50mm f/1.4 Overview

The 50mm f/1.4 AS IF UMC Lens for Pentax K Mount from Rokinon offers a standard 50mm focal length in the full frame format and a very fast f/1.4 maximum aperture for effective low light shooting, fast shutter speed capture, and shallow depth of field control. When used on cameras with an APS-C format sensor its 35mm focal length equivalence is 75mm. 

The optical design of the lens consists of 9 elements in 6 groups, including one hybrid aspherical element and one aspherical element to reduce chromatic aberrations. Also, lens elements are coated with an Ultra Multi-Coating to improve light transmission and minimize flare and ghosting. Eight diaphragm blades create a circular aperture for more attractive out-of-focus highlights.

As a manual focus and manual aperture lens, it provides a rubberized focus ring and clear aperture, distance and depth of field markings. Its internal focus system will not extend the length of the lens while focusing and an included petal shape lens hood blocks unwanted light and protects the lens.

Standard length prime lens for full frame cameras, also compatible with APS-C cameras on which it has a 35mm focal length equivalence of 75mm
Very fast maximum aperture of f/1.4 for effective low light capture and shallow depth of field focus control
Hybrid aspherical and aspherical lens elements control chromatic aberrations for clear and color-accurate images
Ultra Multi-Coating (UMC) improves light transmission and reduces ghosting and flare
Manual focus lens with internal focus system
Eight-blade diaphragm creates circular aperture
This lens features a mechanical aperture coupling that permits the use of aperture priority and automated exposure modes, as well as the ability to control the aperture setting with Pentax DSLRs
Includes removable petal-shaped lens hood
UPC: 084438763911

Rokinon 50mm f/1.4 Specs

Key Specs
Focal Length
50mm (35mm Equivalent: 75mm)
Maximum Aperture
f/1.4
Lens Mount
Pentax K
Lens Format Coverage
Full-Frame
Focus Type
Manual Focus
Image Stabilization
No
Filter Size
77 mm (Front)
Maximum Aperture
f/1.4
Minimum Aperture
f/22
Lens Mount
Pentax K
Lens Format Coverage
Full-Frame
Angle of View
46.2°
Minimum Focus Distance
17.7" / 44.96 cm
Optical Design
9 Elements in 6 Groups
Diaphragm Blades
8
Focus Type
Manual Focus
Image Stabilization
No
Filter Size
77 mm (Front)
Dimensions (ø x L)
3.2 x 2.9" / 8.13 x 7.37 cm
Weight
18 oz / 510.3 g
Packaging Info
Package Weight
1.55 lb
Box Dimensions (LxWxH)
6.3 x 5.3 x 5.2"

Rokinon 50mm f/1.4 Reviews

See any errors on this page? Let us know

Hi, The mount Pentax K is the same for the Pentax ...

Hi, The mount Pentax K is the same for the Pentax ME super so can i use it in my pentax?
Asked by: cesar
Yes the Rokinon 50mm f/1.4 AS IF UMC Lens for Pentax K Mount will fit the Pentax ME Super.
Answered by: Dan W
Date published: 2022-07-19

question

Is there no difference between this and the Samyang? I see that this one has the inclusion of IF in the name for Internal Focus . That sounds like a made up word for manual focus though. Am I right? A big difference I see is $60-$100 which I'd like to save.
Asked by: Robert V.
There is no difference between the two lenses. Rokinon and Samyang are both made in the same factory by the same company.
Answered by: Jacob C.
Date published: 2018-08-25

question

Nowhere do you say if this is an autofocus lens or not.Is it?
Asked by: Kenneth Akiva
Under Product Highlights we list Manual Focus & Aperture Lens .
Answered by: Dennis A L.
Date published: 2018-08-25

Would this be compatible on a Nikon F3? I just ...

Would this be compatible on a Nikon F3? I just recently picked one up and still not sure what lenses I can/can’t use on it
Asked by: Anonymous
Yes it will.
Answered by: Steve
Date published: 2020-02-18

question

Would it fit Canon 70D mount?
Asked by: Mykolas G.
Yes it will...
Answered by: ENRIQUE C.
Date published: 2018-08-25

question

In terms of quality of photographs, for stills exclusively. How does the AS IF 50mm rokinon compare to the CINE 50mm?
Asked by: Stephanie P.
The quality between these two lenses for still photographs will be the same.
Answered by: Heather S.
Date published: 2018-08-25

Is the aperture ring on this lens declicked for ...

Is the aperture ring on this lens declicked for cine/video work ? What is the difference between this lens & Rokinon’s Cine line of lenses ? I would use as a prime on my FS7
Asked by: Christian
It is not, this does not offer a de-clicked aperture. That is one of the main differences between this and a Rokinon Cine lens like B&H # RO5015TSE. Rokinon Cine Lenses offer a de-clicked aperture and have lens gears built in for use with Follow Focus Systems. https://bhpho.to/2psJeOp
Answered by: Joseph
Date published: 2019-04-07

question

Would it fit canon t6i?
Asked by: Jenely
Yes this lens will fit.
Answered by: James B.
Date published: 2018-08-25
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