Are you familiar with holographic laser collimation? http://web.telia.com/~u41105032/holographic/holographic.htm http://www.collimator.com/coltext.htm --- Chuck Hards <chuckhards@yahoo.com> wrote: <snip>
A laser collimator alone is insufficient . . . The optical axis must coincide with the focuser axis to within a fraction of a milimeter and no commercial laser can accomplish this (that I'm aware of). <snip> But for maximum lunar & planetary detail, and for splitting the closest double stars, "dead-on" collimation is mandatory on an f/4.5 scope. <snip> So the reason for this post is one last chance for input from folks with different observing habits or ideas. I am pretty sure I've covered all the bases but it never hurts to step back and go over it all one more time before spending (more) money.
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