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Re: Cleaning Optics

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Posted by Jim Davidson/">Jim Davidson on August 20, 1999 11:44:15 UTC

: : : I have a 3" Oracle and a Celestron C-5. Both have mold ( I think) forming on the inside of the front end glass. How can I remove it and clean the glass or where can I find out how to clean it? Thanks.

: Jim. Idont know the Oracle 'scope but I have had Celestron's to bits. The first thing is to be very careful. Its easy to do a vast amount of damage in a careless moment. If you are very confident and skilled at 'tinkering' then you might go ahead. If I remember correctly the front cell of the Celestron can be taken off fairly easily. Remove the little screws and pull gently. Work over a table - you dont want the front lens to end on the floor in bits ! If you can get the front lens out (actually its a 'Aspheric Schmidt Plate' and a very delicate piece of optics. You might try cleaning the surfaces with a cotton wool swab damped with pure alcohol (I use Iso-propyl-alcohol : known as 'Pro-Pan 2-Ol' Try your local wholesale chemist. Pro-Pan-2-Ol is used for cleaning mirrors prior to aluminising and is good stuff. But it must be kept absolutely clean and not used for anything else. All handling should be with plastic gloves on - I use ordinary washing-up gloves - to avoid fingermarks. Go very carefully - its very easy to make things worse. Good Luck. Let me know how you get on. Best wishes, David. : David - Thanks for your comments. Have finally got my C-5 here in the states and plan to send it to Celestron. Appreciate your help. Jim

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