Alex (or others),
An interesting read this one. It touches on some niggling thoughts I have been having when it comes to EP's and associated items.
Is there any site/resource that comes close to answering this type of question or is it a case of reading several sites and user reports to create a (hopefully) educated opinion. I hope that this is not a silly question.
Secondly, how do things like filter wheels(for example) affect the overall visual integrity. I assume that this type of item would move the EP further away from the secondary mirror, therefore does that not affect the usable focal length of the EP, or am I missing something?
Cheers,
Andrew.
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