The FotodioX M39 Metal Rear Lens Cap is a black anodized aluminum cap that is anti-rust and crush resistant. The rear lens cap is compatible with screw-on M39 and L39 lenses, which protect the rear elements of the lenses once it is on.

Compatible with Screw-On M39/L39 Lenses    Black Anodized Aluminum    Protects Rear Elements of the Lens    Anti-Rust and Crush-Resistant Cap

Related Questions and Answers

Q: 1. Is this supposed to place my m39 lenses upside down when attached to my camera body?

A: No, when using the FotodioX Mount Adapter for M39/L39-Mount Lens to Fujifilm X-Mount Camera one is not supposed to mount the lens upside down.

Q: 2. I have a BMPCC 6K Canon EF mount and I would like to attach a Jupiter 8 L39 Lens will this adapter work?

A: While not aware of a specific test done on the combination this is an EF lens to L39 adapter. It should work.

Q: 3. Will this lens cap fit on the Leica Summarit 90mm f/2.4? I can see one in silver on the website for that lens but I need it in black.

A: Unfortunately not, this lens cap is not the correct size for that lens.

Q: 4. Is this supposed to mount my m39 lenses upside down on the body?

A: No, when using the FotodioX Mount Adapter for M39/L39-Mount Lens to Fujifilm X-Mount Camera one is not supposed to mount the lens upside down.

Q: 5. does this lens cap fit on leica 35mm summicron asph II v.6 without the lens hood, being its e39 as well?

A: The Leica Metal Cap For APO-Summicron-M 50mm f/2.0 ASPH Lens is not compatible with the Leica Summicron-M 35mm f/2 ASPH Lens even though the filter thread is 39 mm for both.

Q: 6. will this allow connection of L-39 threaded lens (Nikon enlarger lent) to Sony A7r4?

A: Yes.

Q: 7. Is this supposed to mount my lenses upside down on the body?

A: No, when using the FotodioX Mount Adapter for M39/L39-Mount Lens to Fujifilm X-Mount Camera one is not supposed to mount the lens upside down.

Q: 8. Is this for rangefinder ltm lenses or the soviet slr lens that have a 39 thread?

A: According to our sources, all LTM M39/L39-mount lenses can be use with this adapter.

Q: 9. Will this focus to infinity ? If not how close ?

A: Yes this adapter will allow focus to infinity.

Q: 10. Will this adapter allow my Voigtlander 35mm 2.5 c-type lens (39 LSM) to work on my Leica m2?

A: Hi Isaac,Yes it will work. It should bring up the 35mm frame lines.