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Rokinon 16mm f/2.0 ED AS UMC CS Lens for Pentax K APS-C Mount

BH #RO162P • MFR #16M-P
57 reviews
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Rokinon 16mm f/2.0 ED AS UMC CS Lens for Pentax K APS-C Mount
Key Features
  • Pentax K Mount Lens
  • For APS-C Sized Image Format
  • Aperture Range: f/2.0-22
  • 24mm Equivalency in 35mm Format
The 16mm f/2.0 ED AS UMC CS Lens for Pentax K APS-C Mount from Rokinon is a manual focus wide-angle lens compatible with APS-C format DSLR digital cameras. It provides an 83.1° angle of view which translates into a 35mm format equivalency of 24mm. A fast maximum aperture of f/2.0 is effective in low light shooting and provides shallow depth of field. With two aspherical lens elements and one extra-low dispersion element, chromatic aberrations are minimized and sharp, color-accurate images are the result. UMC lens coating facilitates even light transmission and reduces ghosting and flare.
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Rokinon 16mm f/2.0 Overview

The 16mm f/2.0 ED AS UMC CS Lens for Pentax K APS-C Mount from Rokinon is a manual focus wide-angle lens compatible with APS-C format DSLR digital cameras. It provides an 83.1° angle of view which translates into a 35mm format equivalency of 24mm. A fast maximum aperture of f/2.0 is effective in low light shooting and provides shallow depth of field. With two aspherical lens elements and one extra-low dispersion element, chromatic aberrations are minimized and sharp, color-accurate images are the result. UMC lens coating facilitates even light transmission and reduces ghosting and flare.

Wide angle focal length equivalent to 24mm in the 35mm format
Fast f/2.0 maximum aperture for effective low light shooting and shallow depth of field
Aspherical and Extra-low Dispersion lens elements reduce aberrations
UMC lens coating allows even light transmission and minimizes ghosting and flare
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
UPC: 084438761306

Rokinon 16mm f/2.0 Specs

Focal Length
16mm (35mm Equivalent: 24mm)
Aperture
Maximum: f/2
Minimum: f/22
Lens Mount
Pentax K
Lens Format Coverage
APS-C
Angle of View
83.1°
Minimum Focus Distance
7.9" / 20 cm
Optical Design
13 Elements in 11 Groups
Focus Type
Manual Focus
Image Stabilization
No
Filter Size
77 mm (Front)
Dimensions
3.27 x 3.46" / 83.06 x 87.88 mm (Diameter x Length)
Weight
1.3 lb / 574 g
Packaging Info
Package Weight
1.615 lb
Box Dimensions (LxWxH)
7.1 x 5.2 x 5.15"

Rokinon 16mm f/2.0 Reviews

A Night Photographer's Staple

By Jiri K
Rated 5 out of 5
Date: 2025-05-05

If you shoot astro and milky way, this is it! - It's nicely wide, even on a crop sensor - 2.0 is plenty fast to keep your ISO down and still avoid star trails - surprisingly sharp wide open and razor sharp 5.6 and up - focus ring has a long throw, is firm, yet buttery smooth. No creep - If you do infrared, there is no red dot, so you need to test focus - mine came with a petal hood - mine is a Pentax mount, so has no confirmation chip - this means no EXIF data other than lens focus distance is written - I use back-button focusing, so can easily focus even without chip Good lens, and for the money a total bargain. Image Quality wise it is on par with my Pentax 15/4 Limited

Meets/Exceeds Expectations

By Kerry
Rated 4 out of 5
Date: 2021-09-15

4.5 Stars. It works great with my K-S2 with the exception that it is hard to turn the F-stop ring while mounted to the camera (flash overhang of body is too close to lens, but that is a Pentax issue and not the lens). Was surprised, but ecstatic, how sharp my photos were shooting hand held in dusk lighting at F2.0. Not bothered by manual focus, but would appreciate at least an ability to project focus indication in the viewfinder so I didn't always have to use the external viewscreen to do my focusing. This is why I pull a half star back. Bought to use for Aurora shooting, haven't had a chance to test that, but feeling confident. Highly recommend for landscape style at the very least.

See any errors on this page?

question

Does light flash in viewfinder when in-focus on Pentax K-3?
Asked by: Larry S.
This lens does not allow for any focus confirmation in the viewfinder on the Pentax K3.
Answered by: Kirk R.
Date published: 2019-02-18

question

Is this lens compatible with a Pentax K-50 camera?
Asked by: Anonymous
YES! The name makes it obvious.
Answered by: Alp SERRA T.
Date published: 2018-08-28

Just purchased the Rokinon 16mm F/2.0 with Pentax ...

Just purchased the Rokinon 16mm F/2.0 with Pentax K mount for my Pentax K-5 IIs body. With the aperture ring set to A, and setting to AV (also B, TAV modes), cannot get F stop to F2 (only goes to F4). Any suggestions? Already have an F4 lens, so getting to F2 is important. Thanks!
Asked by: jayne
I believe the lens is defective. I would recommend contacting customer service to get a replacement.
Answered by: Daniel C
Date published: 2021-12-24

Will this lense work on Canon RP with the adapter ...

Will this lense work on Canon RP with the adapter RF -?
Asked by: Hanh
The Rokinon 16mm f/2.0 ED AS UMC CS Lens for Canon EF-S Mount is an apsc lens and the Canon RP is full frame so it will crop the full frame sensor of the RP. Less than half of the available megapixels will be used, but the lens will work with the Canon EF RF adapter.
Answered by: Daniel C
Date published: 2023-07-06

question

I this lens compatible with Nikon D5100 DSLR.Thanks
Asked by: Anonymous
Yes, it is a fully compatible manual focus lens that will work with a Nikon D5100.
Answered by: Matthew C.
Date published: 2018-08-28

question

Will this lens work with my Rebel K2 35mm film camera?
Asked by: Lisa
This lens is for crop sensor cameras. It will vignette on a 35mm camera.
Answered by: Reuben K
Date published: 2019-08-01

I'm seeing conflicting reports ... Will this lens ...

I'm seeing conflicting reports ... Will this lens work on a Nikon D5000 DX? Wanting it for night/astrophotography. Thank you!
Asked by: N
Yes, Rokinon 16mm f/2.0 ED AS UMC CS for Nikon F Mount is fully compatible with Nikon DSLRs with APS-C sized image format such as your Nikon D5000. The lens is manual focus only therefore you will need to set your camera to manual mode (M), operate the aperture on the lens, and control the shutter speed and ISO on the camera.
Answered by: Llinelva D
Date published: 2021-09-30

question

Can I use this lens with the nikon d5200?
Asked by: Anonymous
Yes, it has the electronic contacts to needed to work with the D3XXX, the D5XXX, and the D7500 cameras. The instruction manual for the Rokinon 16mm f/2.0 states: "Your Nikon mount has electronic contacts that allow it to communicate with Nikon AF cameras. These contacts enable the A, S, and P modes of the camera. When a subject is correctly in focus, the camera emits a beep or an indicator light comes on."
Answered by: Ciaran
Date published: 2019-06-17
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