Jump to content

sgl_imaging_challenge_6_banner_jupiter_2021.jpg.eacb9f0c2f90fdaafda890646b3fc199.jpg

 

 

Using a Bahtinov mask


JamesF
 Share

Recommended Posts

Let's say I want to get Saturn in good focus and with the webcam and barlow (perhaps even an extension as well) in the scope, use a mask to set up the focus on a bright star. So far, so good.

Without GOTO, and as I really don't want to disturb anything I've got connected up, are there any handy tricks for finding Saturn again? The margin of error with an RDF seems sufficient that I'd never be certain of getting it in the field of view. Would it make more sense to use a finder scope, or are there any other cunning methods I'm unaware of?

James

Link to comment
Share on other sites

Even with GOTO it can be a challenging, as you will be more that aware the webcam sensors are very small.

I usually get close using my Telrad, then briefly swap out the webcam for an EP with a much wider FOV. Centre Saturn in the EP (well the unfocused blob that is Saturn) and then swap back to the webcam. So long as the focus is not touched then the webcam will still be focused.

Something like this http://www.firstlightoptics.com makes /proddetail.php?prod=vixen_flip_mirror makes the whole swapping process much easier.

Cheers,

Chris

Link to comment
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
 Share

  • 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.