Voigtlander 25mm viewfinder lens mount_Leica M Accepts any head with a

Accepts any head with a standard 3/8" thread

6 VR telephoto zoom

but it does not work at all

This is definitely an old-school DIY camera

4 AS UMC is a nice manual-focus lens with excellent image quality and smooth mechanical action

Voigtlander 25mm viewfinder lens mount_Leica M Accepts any head with aThis is a modern Voigtlander 25mm viewfinder great if you've got a 25mm lens and no viewfinder. I'll explain why: this is a viewfinder for 25mm lenses. So if your situation is similar to that described earlier in this paragraph, and you're in the market for a 25mm viewfinder, this one is such a viewfinder and should fit the bill.