The 135mm f/2.0 ED UMC Lens for Samsung NX Mount from Rokinon is a manual focus telephoto prime lens useful for portraiture and most telephoto applications. Its fast f/2.0 maximum aperture is effective in low light and enables shallow depth of field control. With a rounded 9-blade diaphragm, shallow depth of field imaging will be rendered with pleasing out-of-focus highlights. On APS-C format mirrorless cameras, this lens provides the 35mm equivalent focal length of 202.5mm. Its minimum focus distance is 2.6'.

The optical design includes one extra-low dispersion lens element to control chromatic aberration, contributing to sharp, color-accurate imaging, and each of its lens elements features Ultra Multi-Coating to improve light transmission and reduce ghosting and flare. An internal focus system prevents the front end from rotating which allows more effective use of variable filters.

A durable metal barrel with a wide focus ring and manual aperture control ring offer tactile control over focus and exposure. An included, removable lens hood deters stray light from entering the lens, while protecting it from accidental impact and precipitation. 

Samsung NX Mount Lens/APS-C    202.5mm (35mm Equivalent)    Aperture Range: f/2.0 to f/22    One Extra-Low Dispersion Element    Ultra Multi-Coating    Manual Focus; Manual Aperture Ring    Minimum Focus Distance: 2.6'    Filter Thread Diameter: 77mm    Removable Lens Hood    Rounded 9-Blade Diaphragm

Manual focus prime lens for portraiture and general telephoto applications

35mm format focal length equivalent of 202.5mm when used on APS-C format mirrorless cameras

One extra-low dispersion (ED) lens element reduces chromatic aberrations

Ultra Multi-Coating (UMC) on the lens elements minimizes ghosting

Non-rotating filter mount

Removable lens hood

Related Questions and Answers

Q: 1. Is the lens hood that comes with this reversible so I can screw it on the lens backwards?

A: yes it is reversible

Q: 2. Is this a full frame lens or crop sensor lens? Does it work on both types?

A: The Rokinon 16mm f/2.0 ED AS UMC CS Lens for Nikon F Mount is designed for APS-C cameras. It is not recommended to use on Full-Frame cameras because it will cause a vignette around the image.

Q: 3. Does this lens have the chip for AE exposure with Nikon cameras (for example, Dikon D5200)?

A: No, the Rokinon 16mm f/2.0 ED AS UMC CS Lens for Nikon F Mount does not have a Focus-Confirmation Chip for AE expsosure with the entry-level Nikon D3000-series and D5000-series DSLR cameras.

Q: 4. Can I use this lens wide-open for astrophotography? Any smearing of stars or other problems at f2?

A: Short answer: Yes . All lenses when fully open will introduce some distortion, so stopping it down a bit always helps. See Jerry Lodriguss' thorough article in Sky and Telescope August 2015 p. 60+. I mounted it to a Nikon D7200 piggybacked on a Meade LX90. Since the mount was in Alt-Az mode, I got field rotation with 30 second exposures. With a wedge and the LX90 polar aligned it should do just fine. Issues will be with your mount, not with the lens.

Q: 5. Can I use this lens with the nikon d5200?

A: The Rokinon 16mm f/2 is compatible with the D5200, yes.

Q: 6. Will this lense fit a canon eos 80D?

A: I love this lens. It fits m Canon 40D and my Canon 60Da, so I would say yes it will fit the 80D. But probably no auto focus and no auto aperture.Sharp, well-made lens.

Q: 7. Will this lens work with my Rebel K2 35mm film camera?

A: This lens is for crop sensor cameras. It will vignette on a 35mm camera.

Q: 8. Will this lens work and fit a Samsung NX Mini?

A: No, the Rokinon 16mm f/2.0 ED AS UMC CS Lens for Samsung NX Mount will not mount on the Samsung NX Mini Mirrorless Digital Camera. The NX Mini uses the NX-M-mount that is smaller than the standard NX-mount.

Q: 9. is this for landscape and street photography?

A: Yes, this lens is a great landscape lens. It has a very wide field of view. It could also be used for street photography as well. As far as street photography goes theres no official or specific focal for that subject matter, it more comes down to what you as the photographer envision for your work or what you prefer.

Q: 10. Is this lens compatible with a Pentax K-50 camera?

A: Yes, this lens is compatible with the Pentax K-50.