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Jason, welcome.... I've read most of your posts on CN, good to see you here.
Eric, you mentioned that all the different things do not look concentric when you're collimated, this is quite correct :-) I'm sure Jason could whip up one of his amazing drawings to show why, but there's also lots of info around on the net to explain it. It's basically the result of the secondary being tilted at 45 degrees and intercepting a cone of light that's getting narrower as it travels up the tube...
trust the collimation tools :-)
cheers, Bird
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