>>If one side blacks out (even at f/1.8), I just move my eye
>>relative to the viewfinder until both halves of split images
>>become visible again.
> "Henry Posner/B&H Photo-Video" <[EMAIL PROTECTED]> wrote:
> I presume you meant <even at f/8>.
> The alignment of the eye to the optical center of the finder at
> f/8 or slower to realize both halves of the split image is so
> precise that for ANY practical purpose it is rendered useless
> in the field.
Hi Henry,
You're right, it was actually a typo. I meant <even at f/2.8>
I can get one half of the split image starts to grey out when seen
from the extremes of the viewfinder. This is not present at f/2.5
or faster. [Testing with an EF 50mm f/1.8 lens]
Well, that "too precise it is useless" argument might be true for
a camera with a smaller lensmount. With Canon EOS, I found it
extremely easy to shift my eye until both halves of the split image
were the same intensity, and then confirm focus.
If I needed critical focus, the Magnifier S and/or Angle Finder B
came in very useful.
http://groups.yahoo.com/group/eos/files/jloke/Finders.htm
Cheers
Julian Loke
P.S. Perhaps (lens mount) size /does/ matter :-)
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