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Old 09-02-2013, 10:42 AM
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Rigel003 (Graeme)
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Join Date: May 2006
Location: Adelaide, South Australia
Posts: 1,082
Yes, it's worth doing if you're worried. If there is something there, it could make it more likely to attract dewing. Removing and cleaning the corrector is not hard. You just need to be a bit systematic and careful. The formulas you've shown are good but make sure you use non-coloured detergent (one drop is good) and lots of plain, soft tissues - only one wipe with each and then discard. Get rid of any dust or grit with a blower before you start. When you take off the retaining ring, look for an index mark on the edge that shows the correct orientation relative to the primary (mine was marked with a texta), and return it to the same position afterwards.Counting screw turns sounds obsessive and unnecessary. Just make sure you don't use excessive force when fastening it.

...and try to avoid shining a torch into your optics. There will always be something there and it will only make you worry : )
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