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Old August 15th 03, 02:26 AM
Stephen Paul
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Default Focal Reducers, how do they work?


"Richard Kenney" wrote in message
hlink.net...

I guess that a dew shield would worsen the vignetting?


The C8 lens shield "claims" to, "unlike others", not cause vignetting.
Whatever that means. I use one on my C8 and the "shield" effect (which
blocks stray light) is more important to me than the dew prevention, since I
also have heaters.