The 16mm f/2.0 ED AS UMC CS Lens for Samsung NX Mount from Bower is a manual focus wide-angle prime lens compatible with Samsung NX APS-C format mirrorless digital cameras. It provides a 79° angle of view which translates into a 35mm format focal length 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 high index extra-low dispersion glass, chromatic aberrations are minimized and sharp, color-accurate images are the result. Full multi-coating facilitates even light transmission and reduces ghosting and flares.

Samsung NX Mount/APS-C Format    24mm (35mm Equivalent)    Aperture Range: f/2.0-22    Two Aspherical Lens Elements    High Index Low Dispersion Glass    Multi-coated Optical Glass    Minimum Focus Distance: 7.8"    Manual Focus

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

Two aspherical elements and high index low dispersion optical glass reduce aberrations.

Lens multi-coating allows even light transmission and minimizes ghosting and flares.

Related Questions and Answers

Q: 1. Will this lens work well with the T5i for daytime landscape and astrophotography?

A: Yes, if you are comfortable with manual focus. If the T5i has focus peaking (which I doubt), it would be easy. If not, you can use the LCD screen (not as easy). I use it on my Olympus (with adapter), which has focus peaking and that works well.

Q: 2. 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: 3. Is this lens compatible with a Pentax K-50 camera?

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

Q: 4. It serves a full frame?

A: Hi Nicolas. The B&H website notes: The vignetting is obvious when using the Rokinon 16mm f/2 lens on a full frame camera. There is an example of the vignetting, but the lens fills most of the frame. I use a partial frame Canon XSi camera and it easily fills the frame. Dave

Q: 5. Is the lens hood that comes with this reversible so I can screw it on the lens backwards?

A: yes it is reversible

Q: 6. is there a crop factor on this lens?

A: Lenses don't have crop factors, cameras do. This lens is meant for a cropped sensor or aps-c camera.

Q: 7. Is this lens compatible with a Canon SL1?

A: This is an ef-s lens. Canon USA says sl1s are compatible with all ef lenses, including ef-s. I use this lens on canon t3i and t3 both of which also take ef and ef-s lenses.

Q: 8. 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: 9. is the focal throw is good for video or better to buy the cine version ?

A: The throw of the Samyang 16mm f/2.0 is roughly 120~135 degrees based on my estimation after playing with it in the store. The Cine version is likely only different in that it has follow-focus gears. If you are interested in getting gears for this lens separately and using the lens for both photo and video, that would make this lens a very versatile choice. The diameter of the focus ring is 73.9mm.

Q: 10. 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.