Quote:
Originally Posted by Paul Haese
I am not sure. In the Tak scope I can see the mirror clips on the side of the primary. And; the secondary baffle does not appear to be causing a huge obstruction in the Tak scope. Mathematically the secondary is 5mm further away in this scope too. So if anything it should present less of an obstruction really??
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If that is so then the only other thing that could cause an abnormally large secondary shadow is a correction error. You mention a 5mm change of mirror spacing in the new incarnation. I don't know how tight these spacings need to be held to remain with good correction. A star image racked the same amount in mm the other side of focus would show if the abnormally large secondary shadow is a correction error or a vignetting issue. If it is a vignetting issue the appearance will stay the same on the other side of focus.