Quote:
Originally Posted by Merlin66
David,
As I think I've mentioned before, the Interference transmission filters (ITF) at the front of the blocking filter assembly (In both the Lunt and the Coronado) are prone to failure.....
There has been a lot of discussion and debate on these failures, and it now seems that humidity (and/ or moisture) is causing the failures.
The composite filter sandwich has an epoxy edge seal to prevent this happening, but with usage, temperature cycling etc etc this seal can (and does!) breakdown. Once the seal has gone it's only a matter of time......
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is there an answer? what other ways are there to use the scope? 80% of us leave in a coastal environment!!! as for humidity, well how can you escape that. in an obsevatory you dont pack your scope away, its covered but with the weather we have had - gawd we have had 80% of the time cloudy or raining over the past 12 months......
