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Explore Scientific 152mm achromatic refractor

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#1 Olympian

Olympian

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Posted 18 August 2019 - 05:40 AM

I found the answer to my question on dew spot buildup on the glass of my telescope. Thank you for the help. Really great.

 

 


Edited by Olympian, 18 August 2019 - 01:28 PM.

 

#2 junomike

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Posted 18 August 2019 - 06:29 AM

Need more info are the circles concentric like Newton Rings or mere dust/dew marks on the lens?


 

#3 SeattleScott

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Posted 18 August 2019 - 10:31 AM

Sounds like water marks from condensation. My guess is you have brought the scope into a warm house from the cold outdoors without insulating the scope (by putting it in a case or something) so it could slowly acclimate. Unless you are saying these spots were there when it arrived from the factory.

Scott
 


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