The Rokinon 50mm T/1 5 High Speed Cine Manual Focus Lens has been developed primarily for professional cine / movie making purposes It features a durable metal barrel with follow-focus gearing and a decoupled aperture which allow the user to smoothly and quietly change focus and aperture / depth of field while filming With a minimum focusing distance of 1 6 feet (50cm) objects are captured close-up with incredible detail A rounded 9-blade diaphragm contributes to a pleasing out-of-focus quality when using selective focus or shallow depth of field techniques Optical construction is comprised of 8 elements divided into 7 optical groups with two aspherical elements to reduce chromatic aberration and distortion It is designed with internal focusing (IF) meaning the lens barrel does not turn or change in size when focusing Ultra multi-coated glass allows for a high level of light transmission and minimizes flare and ghosting Also includes a removable lens hood to deter stray light from entering the lens while protecting it from accidental impact and precipitation Key Features &bull Covers Fujifilm X Mount APS-C sensor format &bull Great for low light and shallow depth of field due to its T/1 3 aperture &bull Decoupled aperture ring for smooth quiet exposure adjustments &bull Optical construction consists of 8 elements in 7 groups &bull 2 Aspherical Lens Elements &bull Ultra multi-layer coating to reduce flare &bull Minimum focusing distance of 1 6 ft (50cm) &bull Internal focus design to maintain the overall lens length during use &bull Front filter mount does not rotate when focusing &bull Rounded 9-blade diaphragm contributes to a pleasing out-of-focus quality &bull Includes lens hood and soft pouch