Affording you a life-size 1:1 magnification and a minimum focusing distance of 1', the Pentax K mount Samyang 100mm f/2.8 Macro Lens for Pentax Kfrom Samyang 100mm f/2.8 Macro Lens for Pentax Kis a manual focus short telephoto designed for working with subjects both near and far. The optical design incorporates one high refractive index element and one extra-low dispersion element to reduce chromatic aberrations and distortions throughout the focusing range, and an Ultra Multi-Coating has also been applied to minimize flare and ghosting for increase contrast and color neutrality. A long focal length lens with close focusing abilities and a high magnification ratio, this macro lens is ideal for making close-up, detailed images of nearby subjects.

K Mount Lens/Full-Frame Format    Aperture Range: f/2.8 to f/32    One High Refractive Index Element    One Extra-Low Dispersion Element    Ultra Multi-Coating    1:1 Magnification, 1' Minimum Focus    Internal Focus; Manual Focus Design    Non-Rotating Filter Mount    Rounded 9-Blade Diaphragm

This 100mm f/2.8 lens features a Pentax K mount, and is compatible with full-frame sensors or APS-C sensors, where it will provide a 150mm equivalent focal length.

A bright f/2.8 maximum aperture is useful for working in a variety of lighting conditions and the minimum f/32 aperture helps to attain a long depth of field when working with close-up subjects.

One high refractive index element and one extra-low dispersion element help to control chromatic aberrations and minimize distortions throughout the focusing and aperture ranges.

An Ultra Multi-Coating has been applied to lens elements to reduce lens flare and ghosting for increased clarity, contrast, and color fidelity.

Featuring a macro design, this lens affords a 1:1 maximum magnification ratio along with a minimum focusing distance of 1'.

Benefitting working with especially close subjects, this manual focus lens features an internal focus design to maintain the overall lens length during use. Additionally, the front filter mount does not rotate when focusing to better enable the use of polarizers, graduated ND, and other filter types that require precise positioning.

A rounded nine-blade diaphragm contributes to a pleasing out-of-focus quality when using selective focus or shallow depth of field techniques.

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.

Related Questions and Answers

Q: 1. Is this essentially the same lens as the Rokinon 100mm f/2.8 Macro Lens for Sony E?

A: You are correct.

Q: 2. For mirrorless cameras, the lens comes with an adapter. Is the adapter removable? If yes, what the native mount of the lens for your particular mirrorless camera?

A: The lens does not come with an adapter. The mount installed is specific to the MFT system. You could purchase the version for a Canon EF/Nikon F-mounts and then use an adapter like this: https://bhpho.to/3a9cMbo

Q: 3. Is the lens hood included with de Samyang 100mm f/2.8 like its Rokinon analog?

A: The Samyang 100mm f/2.8 ED UMC Macro Lens for Nikon F does come with a lens hood, yes.

Q: 4. Is the lens auto focus, or strictly manual focus?

A: This lens is manual focus only.

Q: 5. Does flexible focus point work in manual focusing on this lens with a Sony A7ii?

A: According the Sony Manual for the A7II (page 64) flexible spot is only available in autofocus mode. https://www.sony.com/electronics/support/res/manuals/W001/W0014808M.pdf

Q: 6. Is this full frame lens or APS-C lens?

A: It is a full frame lens.

Q: 7. I have d3500 and it shows this lens as incompatible, no sign of chip comunication, no exposure metering. Is this expected as its not listed in compatible list here, or should i be worried?

A: Yes, this lens will work with your camera, it will be manual focus and manual exposure.

Q: 8. Can this lens be used on a K-5?

A: Yes the Pentax HD Pentax-D FA Macro 100mm f/2.8 ED AW is compatible with the Pentax K5 camera.

Q: 9. Can a fuji xt-10 manage this lens in terms of weight? Reviews indicate it's heavy.

A: Yes the X-T10 can handle this lens.

Q: 10. Has it been confirmed with Pentax that this features an in-lens DC autofocus motor? I have not seen this reported anywhere else.

A: The manufacture says the Pentax HD Pentax-D FA Macro 100mm f/2.8 ED AW uses the Body -AF.