This product seems like a good idea to me, am I missing something?
It's been discontinued by everybody:
Maybe it doesn't work well with modern imaging?
Is it now a classic we must go hunt the used market to find one?
Maybe it reduces precious light too much for astronomy?
When I did film years ago I always kept a Skylight filter on my lens to protect it.
Keeping dust out and off the primary and especially the secondary is a great idea.
Not to mention the other benefits listed for this Skylight Filter/Dust Seal.
IT sure would help preserve our old SCT MCT coatings, or is it better to introduce
some outside air once in a while? the coatings have lasted pretty well in my oldest
from 1975 but still there is some loss of reflectivity from age I'm sure.
Edited by clamchip, 13 March 2019 - 02:10 PM.