Chris1011 wrote:

....

The difference is that the coating on the Everbright is a dielectric which does
not dim with age and is fully cleanable. .... The dielectric coating can
be cleaned repeatedly without introducing sleeks into the coating (which will
happen with a normal aluminum diagonal). Sleeks, will of course permanently
reduce the planetary contrast of your diagonal.


I have (reportedly 1/20th wave) Vernonscope enhanced silver diagonal which started
to have tarnished spots on the perimeter.
What can be done with it ? Who does enhanced silver coatings or can be the type of
coating changed ?


Thanks,

David