Diopter Dial - Whats it for ?

Discussion in 'Photography' started by John, Nov 28, 2003.

  1. John

    John Guest

    My Olympus C-900 Zoom has a Diopter Adjustment dial.

    What is it for... when is it used ?
    The operating instructions don't give much of a clue. Adjusting
    the dial doesn't seem to make a difference as far as I can see.

    John, Nov 28, 2003
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  2. John

    Peter Guest

    I'm not familiar with that particular camera (I'm a Minolta man), but
    I'd assume that this dial is associated with the eyepiece. (My more
    recent cameras have this feature.) It'd be to correct for poor
    eyesight, so that spectacle-weareres (like me) can use the camera with
    their glasses off. I'd expect a correction range from something like
    +3 (moderate long sight correction) to -3 (moderate short sight
    correction). (For older cameras, like my Minolta X-700 and XD-7, it's
    common to buy separate correction lenses which clip onto the

    Peter, Nov 28, 2003
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  3. John

    Mosaic Guest

    The diopter dial compensates for bad vision. I use it when I don't have my
    contacts in and I'm using manual focus. What's in focus without my contacts
    won't be to everyone else.
    Mosaic, Nov 28, 2003
  4. John

    tim sewell Guest

    This is a pure guess but... If the diopter adjustment dial is anywhere near
    the viewfinder, then it probably adjusts the viewfinder focus to allow for
    individual eyesight capabilities.
    Tim S.
    tim sewell, Dec 2, 2003
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