M42 to Nikon

Discussion in '35mm Cameras' started by Paul Furman, Mar 3, 2010.

  1. Paul Furman

    Paul Furman Guest

    That's not going to get infinity focus on any DSLR is it? I have a 500mm
    M42 lens that works so I thought it would but apparently that's just an
    oddity. But it should be fairly close, at least mostly usable. Less so
    with a slim adapter, very close if I could replace the mount on the lens.

    M42 screw M42×1 thread 45.46
    Nikon F bayonet 46.5

    Hmm, if I test a Nikon lens of similar focal length, it goes to about 20
    feet away when I pull it a couple mm off the mount. I have a Leica
    thread 39mm rangefinder that only goes out to about a foot away at
    infinity but that's 28.8-46.5=17.7mm off plus the 2mm adapter, almost
    20mm difference. This would only be 1 to 3mm difference. 1mm if I
    actually changed the mount on the lens.

    M42 won't quite work on even a Pentax bayonet body without changing the
    mount, theoretically possibly on Sony if there was a 1mm thick adapter
    (unlikely), even Canon, it would be tough to get a 1.5mm adapter. I
    thought these were in more common use but apparently not. Anyone use
    them on Canon?

    BTW, I have ground down an Olympus OM mount to fit into a Nikon mount,
    and I once tried mounting Minolta lens on my Nikon: it fit in the
    bayonet but didn't lock.

    micro 4/3 Bayonet 20
    C-mount 1″×32tpi 17.526
    Leica M bayonet 27.95
    Canon screw M39×1 thread 28.8
    Leica screw M39×26tpi 28.8 **************
    Olympus Pen F bayonet 28.95
    Canon R/FL/FD breech/bayonet 42
    Nikon rangefinder bayonet 34.85
    4/3 System digital bayonet 38.58
    Konica F bayonet 40.5
    Yashica Pentamatic,
    Pentamatic II bayonet 43
    Minolta MD bayonet 43.72 +0.01 -0.02
    Canon EOS bayonet 44
    Sigma SA inner bayonet 44
    Sony Alpha,
    Minolta AF bayonet 44.6
    Voigtländer Bessamatic bayonet 44.7 **************
    Pentax K-mount bayonet 45.46
    M42 screw M42×1 thread 45.46
    Olympus OM bayonet 46
    Nikon F bayonet 46.5 **************
    Paul Furman, Mar 3, 2010
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