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Samyang 10mm f/2.8 ED AS NCS CS Lens (Pentax K Mount)

BH #SA1028P • MFR #SY10M-P
13 reviews
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Samyang 10mm f/2.8 ED AS NCS CS Lens (Pentax K Mount)
Key Features
  • Pentax K Mount Lens
  • Aperture Range: f/2.8 to f/22
  • 15mm (35mm Equivalent)
  • Designed for APS-C-Sized Sensors
The Pentax K mount Samyang 10mm f/2.8 ED AS NCS CS Lens is a prime, manual focus wide-angle lens designed specifically for use with APS-C-sized image sensors. Providing a 35mm-equivalent focal length of 15mm and a broad 109.5° angle of view, this lens is ideally suited for interior, architectural, and landscape photography applications. One extra-low dispersion element and two aspherical elements have been incorporated into the optical design to minimize chromatic aberrations and distortion in order to produce sharper images. Additionally, a nano crystal anti-reflection coating system (NCS) has been applied to lens elements in order to reduce surface reflections and prevent lens flare and ghosting for improved light transmission and more contrast-rich imagery.
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Samyang 10mm f/2.8 Overview

The Pentax K mount Samyang 10mm f/2.8 ED AS NCS CS Lens is a prime, manual focus wide-angle lens designed specifically for use with APS-C-sized image sensors. Providing a 35mm-equivalent focal length of 15mm and a broad 109.5° angle of view, this lens is ideally suited for interior, architectural, and landscape photography applications. One extra-low dispersion element and two aspherical elements have been incorporated into the optical design to minimize chromatic aberrations and distortion in order to produce sharper images. Additionally, a nano crystal anti-reflection coating system (NCS) has been applied to lens elements in order to reduce surface reflections and prevent lens flare and ghosting for improved light transmission and more contrast-rich imagery.

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.

Prime wide-angle lens provides a 35mm-equivalent focal length of 15mm, making it ideally suited for indoor, architectural, and landscape subjects.
Fast f/2.8 maximum aperture benefits working in low-light conditions.
Manual focus design permits selective control over focus placement.
One extra-low dispersion element and two aspherical elements reduce chromatic aberrations and distortions in order to produce sharper images.
Nano crystal anti-reflection coating system improves light transmission and suppresses lens flare and ghosting for more contrast-rich, color-neutral images.
UPC: 084438762235

Samyang 10mm f/2.8 Specs

Focal Length
10mm (35mm Equivalent: 15mm)
Aperture
Maximum: f/2.8
Minimum: f/22
Lens Mount
Pentax K
Lens Format Coverage
APS-C
Angle of View
109.5°
Minimum Focus Distance
9.45" / 24 cm
Optical Design
14 Elements in 9 Groups
Aperture/Iris Blades
6
Focus Type
Manual Focus
Image Stabilization
No
Dimensions
ø: 3.39 x L: 4.12" / ø: 86.11 x L: 104.65 mm
Weight
1.28 lb / 580 g
Packaging Info
Package Weight
1.71 lb
Box Dimensions (LxWxH)
7.7 x 5.2 x 5.2"

Samyang 10mm f/2.8 Reviews

tack sharp....except the lens says its at 3 feet and the focus is infinty.....no big deal...its a manual focus lens so you better focus it yourself and not depend on the markings...

By Bob
Rated 3 out of 5
Date: 2025-12-19

tack sharp...weird focusing....

Great lens for the earth and the sky

By Mark
Rated 5 out of 5
Date: 2018-06-18

I bought this for my K-50 because it was designed specifically for APS-C format cameras. Absolutely delighted with how it worked during our recent trip to Grand Teton and Yellowstone National Parks. The depth of field is amazing - when shooting in bright light I set the f-stop to 4 or 5.6 in AV mode and then set the lens using the depth of field markings. The K-50 happily chirped every time, telling me it was in focus. During the evenings for night sky shooting all I had to do was open it wide to f/2.8 and set the focus marking to infinity - I tested that during the day time as well. Perfect pinpoint stars near the center and just a trace of astigmatism at the corners - very good performance. Looking forward to using this beauty during future travels that take us into grand buildings, where the ultra-wide rectilinear performance will really be handy. Should have bought one three years ago.

See any errors on this page?

question

what about square filters? (cokin etc)
Asked by: Anonymous
Unfortunately, it does not appear as though a filter holder is available for this lens at this time.
Answered by: Christina S.
Date published: 2019-03-28

I HAVE A QS1. WILL THIS SAMYANG 10MM DIRECT MOUNT ...

I HAVE A QS1. WILL THIS SAMYANG 10MM DIRECT MOUNT W/0 A K ADAPTER?
Asked by: Mel
No, you need a K-Q adapter, click the link below to view; https://www.bhphotovideo.com/c/search?q=lens%20adapter&filters=fct_camera-body-mount_1595%3Apentax-q%2Cfct_category%3Alens_adapters_3420%2Cfct_lens-mount_1596%3Apentax-k
Answered by: Rob
Date published: 2021-01-18

How is this lens for astro-photography?

How is this lens for astro-photography?
Asked by: James
For wide angle views of the Milky Way, or constellations, or shooting nightscapes, it is very good. Very sharp wide open. I've used it with my K50 and an external battery using the interval timer function for meteor showers, as well as with a manual barn-door tracker (you can make one with a strap hinge and a bolt or just buy one of the small camera tracking mounts). Very good images. Search on AstroMark 40 Years Worth in Flickr if you want to see examples taken at Grand Teton National Park.
Answered by: Mark
Date published: 2021-08-06

question

Can you tell me the difference between this and the Rokinon version... apart from the $1 price difference!I know it's a different choice of lens options, but is the image quality very different to the Tokina 11-16? I can't find a direct comparison/website that has a review of both (so would run the same tests).
Asked by: Anonymous
Rokinon is the makers' brand (ROK for Republic of Korea), Samyang is a second brand of the same maker. The image quality of both the Samyang 10mm and Tokina 11-16 are very good, though the Tokina lens will give you more versatility if you wanted to have zoom.
Answered by: Heather S.
Date published: 2018-08-25

question

Does the lens come with a Cap and Hood?
Asked by: Bronson D.
The following items are listed under the In The Box section on our website as included with the Samyang 10mm f/2.8 ED AS NCS CS Lens (Sony E Mount):In the BoxSamyang 10mm f/2.8 ED AS NCS CS Lens (Sony E Mount)Front and Rear Lens CapsLens HoodSoft Lens BagLimited 3-Year WarrantyAs indicated, both the front and rear lens caps, as well as the lens hood, are included by Samyang with the lens purchase.
Answered by: Manzell L.
Date published: 2018-08-25

question

Would that lens work well on the Canon C300 Cinema Camera ?
Asked by: Jp
This lens covers an APS-C/Super 35mm sensor, which the C300 has. The Samyang 10mm will work very well on the Canon C300.
Answered by: Joseph P.
Date published: 2018-08-25

question

Is this lens compatible with the Nikon D5600 or 3400?
Asked by: Jabz D.
The Samyang 10mm f/2.8 ED AS NCS CS Lens (Nikon F Mount) B&H # SA1028NAE is designed for Nikon DX/APS-C cameras such as the D5600 or D3400. You are all set.
Answered by: Dennis A L.
Date published: 2018-08-25

Your description mentions a couple of times that ...

Your description mentions a couple of times that it's a 15mm! This is a 10 correct?
Asked by: Michael
This is 10mm lens for APS-C sensor the crop factor is 1.5 , that's equivalent to 15mm angle of view
Answered by: vilson
Date published: 2021-01-12
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