Quote:
Originally Posted by bojan
Hmmm..
If there is a difference in colimation when scope is hor or vert, then you have a mechanical problem with optics (something is moving..). So you have to fix that first, IMO.
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I agree Bojan, but that would be on a mirror cell separate to the mirror box, with whiffle bars (or the old slings) and the mirror supported on corked tip triangle pads hopefully based on a PLOP calculator.
None of which is present on a standard SW/GSO newt that I have, the collimation bolts are untipped single bolts and at the edge of the mirror. Without using the retainer pads to fix the mirror and cause optical flex I am assuming I will have movement above 1/4 wave lengths. The current SW/GSO designs seems to be the same design as mentioned in telescope books from 70+ years old...
But I could be wrong, so, best to ask I thought.
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I seem to remember one of our more talented amateur scope tinkerer's remade the back of the cell to accommodate a 3 point support system more in line with modern designs and report a good improvement.
https://www.iceinspace.com.au/forum/...ht=mirror+cell
Something I can see a lot of sense in, but not able to progress with atm.