Quote:
Originally Posted by gregbradley
Older higher quality optic C8s seem to have the edge.
Greg.
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The 3 recently made Celestrons I've owned in the last couple of years have had very good optics (C6, C8, C9.25 Edge) and tests over at Astro-foren have shown recent C11's with excellent optics (~0.96 strehl, ignoring the obstruction).
The only common QC issue in the last few years is that they seem to have changed over to a less suitable grease for the primary mirror baffle and/or focuser; my C6 had become sufficiently cloudy inside the corrector that I removed and cleaned it recently, though focusing is still smooth. My 5 or 6 year old C11 is still clean inside but has bumpy focus travel - it could do with a regrease. Meade still seems to be using a good quality grease.