Showcase Carl Zeiss Jena 5cm F2.8 Tessar, chrome-nose, Contax mount, via Amedeo Adapter

Discussion in 'Adapted Lens Sample Image Showcase' started by Brian, Oct 5, 2014.

  1. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    The 5cm F2.8 Tessar never seemed to get the respect that the F3.5 version did. The original Black-Nosed version is stated to be a different optically. I have one, will do a close comparison.

    This one had a bad front element when received, about the center 1/3rd had heavy cleaning marks. I replaced the front element from a parts lens. Then shimmed it to be between the Contax RF and Nikon S-mount. Used with a Nikon-Leica Amedeo adapter.

    Wide-Open, on the M9.

    15429519396_21fe59b099_o. Gunston Hall

    At F4,

    15265977158_cecbe3e2b6_o. Gunston Hall
     
  2. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    The replacement front element is coated, the original two have a nice bloom to them.

    15452588715_eb33db6b25_o. Gunston Hall

    This is wide-open, I'm impressed by the flare-resistance on this lens.
     
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  3. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    I may have such a Tessar among my old 5cm lenses.
     
  4. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    The Contax RF Mount 5cm F2.8 Tessar was labeled "A Dog", with the F3.5 being much more popular. I need to try out my even earlier black-paint version.
     
  5. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    The 3.5 costs also much more for its better reputation.
     
  6. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    Tessar 5cm 2.8:

    U3565I1233976243.SEQ.0.
     
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  7. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    Dana's hair is beautiful in the sun. She has grown so much since this picture was taken.
     
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  8. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    Daughters do this to us, Brian! They grow up fast. I catch them on "sensor" (not film anymore) as often as possible.
     
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  9. dante

    dante Leica Place Rookie

    19
    Nov 18, 2015
    Brian, I'm having front focusing issues with one of these (collapsible prewar 2.8) on an Amedeo adapter - the RF reads 1.75m; correct focus is when the adapter reads 2m. It looks like it might be 8cm close at 1m. It's a very sharp lens, but I'm stumped as to what could be out of adjustment?

    Thanks!
    Dante
     
  10. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    The Tessar uses a Shim- I remember having to make a new one when replacing the front element in this lens. The rear group has spanner slots, then I thing the front section comes out to reveal a shim- similar to an Industar-50. The front element is held in by the namering, rubber cork got it out. I remember it making sense once unscrewing things with the spanner, and actually going back together again. The Sonnars are easier- one set screw and the barrel unscrews from the mount.

    It sounds like the shim is too thick to focus so far out.
     
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