Jump to content


Dumb question solar - Ha filters and CaK diagonal

Recommended Posts

I have what might be a dumb question...:)

I have a Cak diagonal. I know I can use it without a front filtering on a scope with less than 100mm aperture. But can I also use it with a front filter? I know I'll lose some aperture (my filter is 50mm and my scope is 72), but my front filter fits so snugly that its quite hard to get off and I'd rather have the option of leaving it on when I'm under time pressure.



Link to post
Share on other sites


Which "front filter" do you mean?

If you're thinking of the Ha solar filter...then it won't work...The CaK bandwidth is completely different from the Ha...nothing would get through.

Link to post
Share on other sites

Thanks for the quick reply Ken. Yes, its a Lunt 50mm Ha solar filter. Ah well, I'll just have to take it off.

How's Brussels?? I hope you're getting more sun than here - I've managed next to nothing since Christmas!


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.