Leaf shutter lens on a focal-plane shutter camera?

Discussion in 'Photography' started by Lunaray, Nov 2, 2003.

  1. Lunaray

    Lunaray Guest

    I'm considering purchasing a Pentax 67 II camera which has a cloth
    focal-plane shutter, and Pentax makes a "leaf-shutter" telephoto lens for it
    (SMC P67 L.S. 165mm F4.0) How does this work? I understand the advantage
    of a "leaf shutter" (less vibration), but how does this work with a
    focal-plane-shutter camera?

    Thanks all!
    Lunaray, Nov 2, 2003
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  2. The biggest advantage to a camera that has a 'between the lens' (BTL)
    shutter is that you have flash sync no matter what the shutter speed.
    Whereas with a focal plane shutter, you need to have a shutter speed usually
    of 1/60 (some 1/90 or 1/100) in order to be in sync with the flash.
    Nicole Piotrkowski, Nov 2, 2003
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  3. Lunaray

    Lunaray Guest

    Well okay, but how does a camera with two shutters work? Is there a control
    to choose which shutter to use, the camera shutter, or the lens shutter? I
    suppose that the focal-plane shutter in the camera would be locked open when
    this type of lens was used, and the exposure would be controlled by the lens
    shutter. Is there a mechanism on the camera that detects when a
    leaf-shutter lens is attached and therefore locks the focal-plane shutter

    Lunaray, Nov 2, 2003
  4. Lunaray

    purplefish Guest

    I have never heard of a camera with two shutters. That would make things a
    little redundent (sp?) wouldn't it. I would think that the best thing to do
    is to throw a roll of film into it and muck around with everything
    (including flash sync speed) and see what ya get.
    purplefish, Nov 5, 2003
  5. Well all of the Speed Graphic cameras usually had two shutters. Many
    Hassleblads could have two shutters. There is no redundance involved. Quite
    simply only one shutter is used at a time. Simple as that!
    Jackof-the-Dust, Nov 5, 2003
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