Quote:
Originally Posted by RB
James listen to John B's advice, as you know he's very knowledgeable and a highly experienced observer and eyepiece expert.
I just wanted to show you what I do if I have to deal with basic smudges etc that aren't too excessive.
Here's an example I did tonight for you on my Meade ETX 90, (btw I know my secondary is off centre, that's why it was dirt cheap).
I haven't cleaned it in over 5 years and it had a smear right across the corrector.
A few quick wipe-overs with my lens-pen and it's back to that 'show-room' look.
Anyway, good luck with your cleaning.
RB
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Your secondary isn't off center, the glue holding the secondary baffle to the glass has softened and allowed the baffle to slide sideways from the secondary.
You can unscrew the from cell of the scope and pull the baffle off and re-cement it in the correct place.
Use a glue that won't liquify when it gets hot as the scope sits in the sun for an hour or two.