The Rokinon Cine DS 10mm T3.1 Wide Angle Lens has been specifically constructed for APS C cameras to provide the most wide angle pictures and videos as possible. Since it is specifically designed for APS C cameras, the photos & videos will appear wider on an APS C camera than the results on the same camera with a full frame lens such as the Rokinon 14mm F2.8. The Rokinon Cine DS 10mm T3.1 is a Rokinon CINE DS lens. As such, its gears will be unified with any other Rokinon Cine DS lenses and the gears will line up with one another. There will be no need to re adjust your follow focus. Additionally, this lens features dual focusing scales, one on each side, and is color matched with all other Rokinon Cine DS lenses.