Spare mounting screws for the EF mount of Blackmagic URSA Mini Pro cameras. The EF mount is held on the camera body by four M3 × 18 mm screws with a 2 mm hex socket, shared by the EF and F mounts. The URSA Mini Pro mount is interchangeable, so the screws are loosened often and easily lost.
Spare mounting screws for the EF mount of Blackmagic URSA Mini Pro cameras. The EF mount is held on the camera body by four M3 × 18 mm screws with a 2 mm hex socket, shared by the EF and F mounts. The URSA Mini Pro mount is interchangeable, so the screws are loosened often and easily lost.
Original screws that hold the EF mount on the camera body.

Lenses cost more than screws. A properly tightened mount holds the lens exactly on axis.
The EF mount is held by four M3 × 18 mm screws with a 2 mm hex socket. The same screws are used in the F mount, so it pays to keep them together with the mount they belong to.
The URSA Mini Pro mount can be changed between EF, PL, F and B4, and shims may be added under it to adjust the flange focal distance. Tighten the screws with a 2 mm hex key, ideally a torque wrench set to a maximum of 0.45 Nm, evenly and in the specified order. Overtightening can damage the thread and the mount.
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