oldshutterhand.com

Rokinon Xeen lenses

These Rokinon lenses especially designed for film-making. This is why there is a thread on the lens barrell. These lenses has a bright T1.5 aperture (Transmission value this is used in cinema instead of f-stops). The lenses has a very solid built from metal, internal focusing, but no electrical coupling with the camera, means no lens data like aperture in Exif and only manual focusing is available.

Available mounts

These lenses are available in the following mounts:
Canon EF, Nikon F, Sony E, Micro 4/3, PL (usual cinema mount)

The following three lenses are available at the moment (three other are perhaps coming in the future, a wider angle and two longer lenses):

The question is do these lenses different than the Samyang photographic or Cine Ds lenses ?
As I understand these lenses have different coatings but optically identical.