How to pre-set aperture on a detached e-mount lens?

Discussion in 'Digital Photography' started by Susurs, Jul 10, 2017.

  1. Susurs, Jul 10, 2017
    Last edited: Jul 10, 2017

    Susurs macrumors 6502

    Susurs

    Joined:
    Jun 18, 2010
    #1
    Hi!

    I was wondering if the only possible way to set and maintain a specific aperture value when a lens (SEL50F18) is detached from Sony e-mount body is to detach the lens while camera is ON? I red somewhere that the last pin on the mount supply’s power to lens, so there cannot be issues (except dust) - is it so?

    P.S. Another question - can anyone share the experience with a Sony lens (probably SEL50F18) reversed + extension tubes for macro photography?

    Thanks! upload_2017-7-10_14-0-52.png :)
     
  2. Stefan johansson macrumors 65816

    Stefan johansson

    Joined:
    Apr 13, 2017
    Location:
    Sweden
    #2
    There are manual lenses for Sony e-mount,Samyang manufacture some really good ones,with mechanical aperture setting on lens,all you need to do,is to set the camera to A mode.
     
  3. Susurs thread starter macrumors 6502

    Susurs

    Joined:
    Jun 18, 2010
    #3
    Thanks! ;) For now, however, I have 2 lenses which set aperture automatically.
     
  4. Stefan johansson macrumors 65816

    Stefan johansson

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    Sweden
    #4
    Yes,but with a fully manual lens,aperture setting will be whatever you choose,until you change it,and you can preset it withouth having lens mounted on camera.
     
  5. Susurs thread starter macrumors 6502

    Susurs

    Joined:
    Jun 18, 2010
    #5
    I do understand this, thanks, ;) but it is not an option at the moment. The question is how to correctly do it with the automatic lens.
     
  6. Stefan johansson macrumors 65816

    Stefan johansson

    Joined:
    Apr 13, 2017
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    Sweden
    #6
    Set camera to "A" mode,set aperture with camera settings,and leave the camera in A mode. On modern automatic lenses for e-mount,there are no aperture settings on the lens itself,the settings is always done from the camera. With a manual lens,it's always done with the aperture ring on lens.
     
  7. kenoh macrumors demi-god

    kenoh

    Joined:
    Jul 18, 2008
    Location:
    Glasgow, UK
    #7
    I would go buy a Canon FD50mm f1.4 (or 1.8 as it is cheaper) and a cheap adapter off ebay.... then it is manual where you need it. Also a Canon 50mm f3.5 macro lens is a cracker. I paid £50 for mine.
     
  8. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #8
    Lenses stay at rest with the aperture wide open, only stopping down to the required value while the camera takes the image so detaching the lens with power on, irrespective of the mode in which the aperture is being set on the camera.

    The only specific lenses I'm aware of where you can do this would be F-mount Nikon pre-G (so with a manual Aperture ring) and then only if you manually hold the mechanical coupling lever so simulating what the body would be doing while taking an image).

    In general I wouldn't recommend attaching/detaching lenses with body power on, it may never cause an issue but live pins can always find a way of being shorted and it <may> then cause an issue that will be expensive to fix.

    Just my $0.02
     
  9. Susurs thread starter macrumors 6502

    Susurs

    Joined:
    Jun 18, 2010
    #9
    E-mount lens powers down with aperture closed.
     
  10. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #10
    Then likely it powers down fully closed, not at the setting selected - have you verified that? Worth checking even if it does appear to stay at a mid-setting, that it truly stays there irrespective of lens handling.
     
  11. Susurs thread starter macrumors 6502

    Susurs

    Joined:
    Jun 18, 2010
    #11
    Setting aperture to a desired value and then removing lens while the camera is ON works fine for me.
     
  12. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #12
    ...seems we've all been wasting our time thinking of solutions then...
     
  13. Susurs thread starter macrumors 6502

    Susurs

    Joined:
    Jun 18, 2010
    #13
    There are no other working solutions for automatic SEL lenses proposed as for now.
     

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