Thread: Protected Aluminium vs Enhanced Aluminium coatings - durability differences?
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Old 31-12-2019, 03:22 PM
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strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline 		 
Join Date: May 2006
Location: Canberra
Posts: 17,689
Not sure if it is of any help but my Orion Optics UK "Hi-Lux" coatings seem to (so far) be adhering to their claim of 25 year durability..?

March 2011 (New)

March 2019

No real discernible degradation...?

Cheers

Mike
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