This precision‑engineered mounting kit provides a direct way to expand lens compatibility on the URSA Mini Pro platform, allowing operators to work with a wide range of EF lenses commonly used in professional photography and cinema environments. Developed for users who require flexibility in lens selection or a reliable spare mount for intensive production use, the accessory gives full electronic connectivity between the camera and supported EF lenses. This ensures accurate iris control, metadata communication and dependable mechanical alignment that mirrors native factory performance. The design incorporates a durable metal housing and a stable locking mechanism, ensuring long life and precise optical seating even during continuous lens changes on demanding shoots. 

The kit is fully compatible with lenses from major manufacturers such as Canon, Zeiss and Sigma, making it particularly useful for productions that rely on fast photo‑style primes, stabilized zooms or lightweight run‑and‑gun setups. Because the URSA Mini Pro platform uses an interchangeable mount system, swapping mounts is straightforward and allows crews to quickly adapt to different optical requirements on set. Whether switching between PL cinema lenses, F‑mount glass or EF optics, the system maintains tight tolerances to ensure consistent flange depth and sharp optical performance across all supported lens types. The included shim set allows precise calibration of the EF mount’s flange focal distance, giving cinematographers the accuracy required for critical focus pulling and high‑resolution capture.

When paired with the URSA Mini Pro camera bodies, the mount supports electronic lens operations through the camera’s standard EF communication interface. This includes iris adjustment via on‑body controls and the ability to store lens metadata alongside recorded footage. These features support streamlined post production workflows and enable more efficient editing, grading and VFX processes by ensuring accurate optical data is retained throughout capture. The mount is particularly valuable for productions that alternate between cinema and photo lenses or require lightweight handheld setups where EF optics offer ergonomic advantages. 

Compact, robust and engineered for direct integration, this EF mounting kit ensures the camera system remains adaptable and future‑proof. By providing compatibility with widely available EF lenses, it enhances optical versatility and makes the camera suitable for an even broader range of productions, from documentary and corporate work to cinematic projects requiring specialist glass.