But if the mirror is off the focus differential between top and bottom
of the frame will only be seen in the viewfinder. "test shots" on the
film will be normal except that focus may not be where expected.
Chuck Norcutt
Moose wrote:
> Some further playing revealed that the mirror was off in the first body,
> which was a fairly recent used addition to my menagerie. A little
> thought led me to the conclusion that the greater problem at shorter fls
> is a percentage thing. If the mirror is 2mm out of alignment at the
> bottom, that's 7% of the focal length of 28mm, but only 1% of 200mm.
>
> The other thing that should be true, but I never tested, is that the
> focus should still be close at the top of the frame and furthest off at
> the bottom, because of the way the mirror is hinged at one end.. So
> that's something to check for on your test shots.
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|