This super wide-angle lens have been designed to work with Full-Frame and APS-C cameras. Its optical construction features 14 elements and 12 optical groups. The lens comes with two ED lenses and two aspherical elements (hybrid and standard). All lenses have been covered with the highest-quality antireflective layers of new generation: UMC - Ultra Multi Coated. This optical construction as well as state-of-the art materials will allow you to take photos of the highest possible quality. Opinions and tests carried out by respected professional magazines and photography portals confirm the lens’ unique quality. Optyczne.pl notices exceptional quality of this lens’ resolution:

"To be perfectly honest, I simply cannot believe my eyes when observing  performances of the developed Samyang. I don’t remember such high MTFs in any wide-angle camera tested with D3x or D200. Samyang, even with maximum aperture, provides high MTF 50 reaching 44 lpmm, moreover results for f/4.0–5.6 are almost record-breaking:46–47 lpmm. It is worth to mention that the best and most expensive lenses tested with D200 scored  47–48 lpmm, but still you have to remember that D200 sensor allows to obtain 1–2 lpmm higher results than D3x. New Samyang is just utterly splendid in the frame centre! It provides significantly higher results than recommended Nikkon 14–24 mm f/2.8 with 14 mm focal length!"

Feel free to take a look at the test we carried out:
http://www.lenstip.com/index.php?test=obiektywu&test_ob=239

Specifications