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Originally Posted by iceman
However that may not be teh same for everyone, so the advice I'd prefer to give is, if in doubt, check and re-check.
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Yeah, no doubt. Doing a star test to double check collimation takes all of 10 seconds. Add another minute if you are actually off and need to tweak it.
My 4.5" F8 has never drifted a millimeter - and that is after some rough handling (one of the virtues of a light and slow scope)
My 10" F5 usually needs a tweak or two every time I take it out and that is after only picking it up and moving it about 20 feet from the shed to the yard. (one of the drawbacks of a heavy and fast scope)
The good news is that the secondaries in both are rock solid and I've never had to touch them. Final field tweaking, if required, just takes a moment using just the primary screws.
IMHO - Don't let this issue impact your decision.
