Lens adapters
Mount converters for cameras and thread adapters for filters and matte boxes, for putting glass from one mount on a body from another.
How to choose a lens adapter
Flange distance decides whether it is possible. Adapting a shorter flange distance onto a longer one needs corrective optics and loses quality. Short-flange mirrorless bodies adapt almost anything; the reverse mostly does not work. Check the two flange figures before ordering.
Camera mounts. Blackmagic supplies factory mounts for the URSA Mini Pro in PL, EF and B4 — these are mount swaps on the body, not adapters between them.
Filter and matte box rings. SmallRig's Adapter Rings Kit (52/55/58/62–95 mm), 95–114 mm threaded ring and clamp-on ring (114 mm to 80/85/95/110 mm) adapt a lens barrel to a matte box or filter. These do not change the lens mount.
Support the adapter. A heavy adapted lens loads the camera mount, not the adapter. SmallRig's lens adapter support for the Nikon FTZ and BMPCC 4K brackets transfer that weight to the rig.
Electronics. A passive mechanical adapter carries no signal: no autofocus, no aperture control, no EXIF. Budget for manual operation unless the adapter explicitly states electronic contacts.
Aputure's Bowens Mount Adapter for the LS 60 Series is a lighting part filed here — it adapts a modifier mount, not a lens.