Understanding Program Mode in X-700

Discussion in 'Film Discussion and Q & A' started by rishi, Aug 10, 2010.

  1. rishi

    rishi TPF Noob!

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    I have read the manual found on this page. I would like to understand how the function physically works.

    My lens is a 50 mm f/1.2 to f/16 MD Rokkor. I set my aperture to f/16, which is the minimum aperture, and set my mode selector in P. Now, I understand that the camera adjusts the shutter speed according to the lighting condition, but I do not understand how the camera adjusts the aperture. The lens is a manual lens and there is no way the camera body can control the aperture on the lens. Even if it does, is there a way of telling which aperture the program has selected? The manual says that the aperture shown in the viewfinder is the minimum aperture and NOT the taking aperture. If that is the case, then what is the taking aperture?

    Thanks.
    Rishi
     
  2. compur

    compur No longer a newbie, moving up!

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    The camera controls the lens aperture via a lever on the body that
    actuates a lever on the rear of the lens which stops down the lens
    when the shutter is released.

    I don't think the X-700 provides the taking aperture information when in
    Program mode.

    Here is a complete manual:
    http://www.cameramanuals.org/minolta_pdf/minolta_x-700.pdf
     
  3. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Sadly, the Minolta X-700 does not provide both the Aperture and Shutter speed info in the viewfinder.
    When set to full Program, only the Shutter speed is known.
     
  4. rishi

    rishi TPF Noob!

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    I see the lever. But that is used for depth of field preview. It is actuated manually.

    When I remove the lens and click in P mode, I do not see any movement in the lever. I guess I have to take it for granted that the camera selects and somehow adjusts the aperture.
     
  5. compur

    compur No longer a newbie, moving up!

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    Yes, and it also sets the aperture of the lens during the exposure cycle.

    Leave the lens on and open the back of the camera while holding it up to
    a bright scene and fire the shutter. You should see the lens stop down
    during the exposure cycle. It's the levers on the body and lens that
    cause that.
     
  6. cooltouch

    cooltouch TPF Noob!

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    Yeah and set the shutter speed to "B" to see this action even more clearly.
     

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