Jump to content

sgl_imaging_challenge_2021_2.thumb.jpg.72789c04780d7659f5b63ea05534a956.jpg

BK7 vs Quartz vs whatever is better still?


Recommended Posts

My Orion (GSO with a sticker) RC has a main mirror made of BK7 glass, and I have now seen versions of this with a Quartz mirror.

Would an 'upgrade' be of any real benefit? Did anyone have an opportunity to compare mirrors of different quality in a similar scope?

Edited by Jessun
Link to post
Share on other sites

As far as I know, BK7 is just a good quality glass with no exceptional thermal properties. Quartz on the other hand has a very low thermal coefficient of expansion and would give its best performace sooner than BK7. Whether this would justify the difference in price is another matter.

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.