The FotodioX M39 Metal Rear Lens Cap Blackis 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. Does this adapter make it possible to capture full frame images on a Nikon DSLR (such as D850 and D750 for example)?

A: Yes, this adapter is for screw mount lenses to fit a Nikon and will give full frame images.

Q: 2. Will this fit my X-pro 1

A: Yes, this Fotodiox M39-FXRF adapter will fit the Fujifilm X-Pro 1.

Q: 3. Does this fit the f/2.4 version of these lenses as well? If not, does B&H carry the correct version of the lens cap for that f/2.4 lens?

A: No, it will not. Version f/2.5 is a 39mm filter size while Version f/2.4 is 46mm filter size. This cap will be too small. And the cap for Version f/2.4 is no longer available through Leica.

Q: 4. Does this fit the 35mm f/2 Summicron-ASPH? If not, is there a metal one that does?

A: The Leica Metal Lens Cap for 35mm & 50mm f/2.5 M Lens is only compatible with the 35mm and 50mm f/2.5 Summarit M lenses. We don't have a replacement metal lens cap for the Leica Summicron-M 35mm f/2 ASPH Lens.

Q: 5. 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: 6. Will this fit on the b+w 82mm variable nd filter? https://www.bhphotovideo.com/c/product/905894-REG/b_w_661075252_82mm_xs_pro_nano_mc_nd_vario.html

A: The Ice Front and Rear Metal Stack Cap Set (86mm) would fit the front of the B+W 82mm XS-Pro Digital ND Vario MRC-Nano Filter (BH #ICESK86 • MFR #ICE-SK86), as that filter has a 86mm front threading. It would not fit the rear of the lens, as that is 82mm threading.

Q: 7. will this allow connection of L-39 threaded lens (Nikon enlarger lent) to Sony A7r4?

A: Yes.

Q: 8. Will this rear cap fit the 82mm Kase Revolution Magnetic filters?

A: Kase 82mm Magnetic Rear Cap BH #KAMRC82 will work with the rear of the Revolution Magnetic filters yes.

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

A: Yes this adapter will allow focus to infinity.

Q: 10. Can this magnetic cap be used with the Sigma 45 2.8 lens? I believe it would fit, but since it's magnetic, I'm wondering if it might damage the 45 somehow.

A: The Sigma LCF5501M Magnetic Metal Lens Cap is compatible with all Sigma I series lenses with 55mm cap diameter. But it is not compatible that one specific Sigma I series lens, the 45mm F2.8 DG DN | C lens.