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Is this a Ritchey-Chretien thing, or a Canon 1000D thing?
I'd be greteful for suggestions about causes and cures for this artifact I am getting in recent images with a new 8" GSO RC. The centre of the image seems to bloom with a fog of light. I have also seen those damned elliptical halos of light from bright stars just on the edge or just off the edge of an image but that seems to be something different and is probably related tp internal reflections.
Here are 2 recent images and you'll see the light blook in the central image. I am hoping more experienced RC users will see this and be able to make an easy diagnosis and presecribe a cure.
Peter
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