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Cleaning secondary and corrector


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Hi Michael,

 

Put these optical surfaces in warm water (50°C) added with dishwashing liquid. Move them in the liquid until the crud disappears.

Then use isopropyl alcohol to rinse these surfaces, and a hair dryer on cold position to remove the alcohol..

 

Then you can put them back, cleaned!!!

 

(This works also for the main mirror.)

 

Best regards.

 

Bernard

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 If I use detergent I make a very dilute solution in distilled water - much less than than you would use for dishwashing - using a fragrance free detergent. Then I rinse MANY times with distilled water - It is amazing how many rinses you need to get rid of the residue!

 

For very stubborn spots I use a lens cleaning solution from VisibleDust, applied with a very soft microfibre cloth, with a very gentle wiping action - but only after all loose dust has been removed

 

Mark

Edited by MarkS
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