The Zeiss Compact Prime CP.2 135mm/T2.1 EF Mount with Imperial Markings is a cine prime lens designed for filmmaking and video production applications. Aside from great optics and mechanics, it offers broad flexibility in the areas of camera compatibility, follow-focus compatibility, and shooting capacity. Announced at NAB 2012, this lens is a long telephoto addition to Zeiss's Compact Prime CP.2 family of cine primes. Like the rest of the family, the 15mm features an interchangeable-mount system that affords a major forward-looking benefit -- not only can the lens now be used with cameras of different mounts, but rather it is ensured to also be compatible with most all future cameras. The system offers compatibility with PL, EF, F, MFT and E mounts. Zeiss's website provides instructions on how to dismantle an existing mount and assemble a new one. The five mounts allow use with cine cameras and DSLRs.