Dirty focussing screen - does it matter?

Discussion in 'Photography' started by Peter Guest, Aug 17, 2005.

  1. Peter Guest

    Peter Guest Guest

    I've had already kind advice on how to clean the focussing screen on
    my EOS 3. No time before I go away to clean it properly though. If I
    use autofocus and can see through the screen to compose the shot, does
    a dirty focussing screen matter?
    Peter Guest, Aug 17, 2005
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  2. Peter Guest

    Rob Novak Guest

    If your canon meters through the prism, schmutz on the screen could
    cause exposure variances.
    Rob Novak, Aug 18, 2005
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