I don't have the Zuiko (which is very highly rated for mirrors) but your
mention of the Zuiko reminds me that I do have an Orion 500/5.6. This
lens was primarily sold as a spotting scope but is designed to take a
T-adapter so can be used photographically as well.
I've only ever used it once as a lens and was disappointed by its poor
showing on contrast. Actually, that's not terribly surprising given
that it's an f/5.6 which means larger secondary mirror, more diffraction
and lower contrast. But what I have never done is try it on the 5D.
Fixing the contrast problem in digital post processing should be easy.
I don't mean to steal this thread but wonder if anyone has used post
processing to fix contrast problems with mirror lens shots. The Zuiko's
high rating includes high contrast for a mirror lens. But my Orion is
hardly the only mirror lens to suffer from low contrast.
Chuck Norcutt
On 2/15/2011 9:37 AM, Nicholas Herndon wrote:
> Anyone have one? How useful do you find it?
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