Thing to activate the auto aperture on a reversed lens?

Discussion in 'Digital SLR' started by Wilba, May 19, 2010.

  1. Wilba

    Wilba Guest

    I've seen mechanical gadgets for stopping down the aperture on reversed
    manual aperture lenses, but are there any commercial products that do that
    electrically for EF lenses? I guess you could wire up two extension tubes to
    do that... what would you call such a thing?
     
    Wilba, May 19, 2010
    #1
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  2. Wilba

    Richard Guest

    If you have a Canon EOS:
    http://www.srb-griturn.com/canon-eos-electronically-coupled-reversing-ring-73-p.asp
    http://www.speedgraphic.co.uk/prod.asp?i=8499&1=Novoflex+EOS-RETRO+Reverse+Adaptor+For+Canon+EOS

    HTH
     
    Richard, May 19, 2010
    #2
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  3. Wilba

    Paul Furman Guest

    There is a way you can stop down when mounted normal, maybe DOF preview,
    then turn it off or yank the battery to lock the aperture where you want.

    --
    Paul Furman
    www.edgehill.net
    www.baynatives.com

    all google groups messages filtered due to spam
     
    Paul Furman, May 19, 2010
    #3
  4. No need to turn it off. Just release the lens while keeping the DOF
    preview button pressed.
     
    Robert Spanjaard, May 19, 2010
    #4
  5. Wilba

    Wilba Guest

    Yeah I know that one. I want to get around having to do that. Thanks anyway.
     
    Wilba, May 20, 2010
    #5
  6. Wilba

    Wilba Guest

    Wilba, May 20, 2010
    #6
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