Flange distances
Approximate published figures: Canon EF 44 mm, Canon RF 20 mm, Nikon F 46.5 mm, Nikon Z 16 mm, Sony E 18 mm, L-Mount 20 mm, Micro Four Thirds 19.25 mm, Fujifilm X 17.7 mm and Pentax K 45.46 mm.
Mounts on this site
Canon RF (RF 45mm), Canon EF (EF 100mm Macro), Sony E (E 11mm), Nikon F (50mm f/1.8G), L-Mount (Lumix S 100mm), Micro Four Thirds (Lumix G 25mm) and Pentax K (HD 100mm Macro).
What a mount does not promise
A mount does not guarantee autofocus or stabilization with third-party lenses; check each lens.
How to check before buying
Match the mount named on the lens to your camera, and check the format it covers.
What people ask before they commit
Why can I adapt DSLR lenses to mirrorless?
Mirrorless mounts have shorter flange distances, leaving room for an adapter. The reverse rarely works.
Do adapters keep autofocus?
Some do, such as Canon’s EF-to-RF adapter or Nikon’s FTZ; others are manual.
Which mount should I choose?
The one whose lenses you want: lenses outlast bodies.
Last reviewed November 2, 2026