Zeiss's CP.3 cinema standard prime — 50mm T2.1 with interchangeable mount for professional production.
The Zeiss CP.3 50mm T2.1 is the standard normal focal length in the CP.3 (Compact Prime 3) cinema prime series, available here in Canon EF mount. The CP.3 generation succeeded the CP.2 with LDS (Lens Data System) metadata electronics for lens position telemetry on compatible cameras and follow-focus systems. Canon EF mount.
T2.1 maximum aperture. 50mm focal length. Canon EF mount. 114mm front outer diameter — cinema-standard. 0.8-module pitch gear rings. LDS (Lens Data System) data output for compatible systems. Close focus approximately 0.6m.
The LDS integration enables real-time lens metadata transmission — focal length, focus distance, and T-stop — to LDS-equipped cameras, follow-focus systems, and production data logging software, which is particularly useful in VFX and multi-camera productions. The Canon EF mount version is compatible with Canon EF-mount cinema cameras, EF DSLRs, and Canon RF via EF-RF adapter.
On the used market the Zeiss CP.3 50mm T2.1 Canon EF is a cinema normal prime with lens metadata capability. Condition checks: Canon EF mount contacts, LDS contact pins (if LDS functionality is required), iris and focus ring smoothness, front and rear element coatings. Verify LDS functionality with a compatible receiving device.