What is Starbright and what is my diagonal?

Started by rcordell, 06/19/2002 06:27AM
Posted 06/19/2002 06:27AM Opening Post
I have tried to figure this out on Celestron's web site but I can't seem to find detailed answers to questions like: What is the percent reflectivity of my c9.25 mirrors that have Starbright coatings. Same question with the 1.25" diagonal (94115-a).

The main thing I want to understand is if the diagonal is a weak point optically. Anybody know?

Randy
Posted 06/19/2002 12:30PM #1
Celestron doesn't quote their reflectance. Their corporate line is that Meade's UHTC is "just catching up". Who knows though.

As for your diagonal...if it is Celestron, then it is most likely the weakest point in your system. Some are decent, some are bad and some are very bad. I'd invest in a Televue (doesn't have to be Everbright), Astro-Physics (if you're rich) or Lumicon (if you're not).