Quote:
Originally Posted by lazjen
Thanks. That's a very specific number. How precise do I need to be?
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You need to get as close as possible. Otherwise even with perfect collimation, you will not have good stars shapes.
From my recollection, I used one of those telescopic pointers. Like those you used to see on radios.
I set its length as close as possible to the separation distance and stuck down each segment with gaffer tape so the distance would not change. It is then possible to get your hand into the tube space and very gently test the separation. Then use the centre bolt in the secondary holder to either shorten or length the distance.
I am sure there are more elegant ways to do it but that is what I did
Ted