Jump to content

Narrowband

Guide Scope & Flip


Recommended Posts

Hello All.

                 Once more unto the Fountain of Information.  I'm putting together a Guider on my Frac.  I'm using  Baader Varioscope and thought I might complicate things a bit it seems.  I want to use a Flip Mirror with it to alternate between Finding then Guiding.  The Backfocus required for the ZWO ASI462 that I have set aside for the job is 12.5mm.  A Polaris II Eyepiece is being used and is screwed into the other Port of the Flip.  Do I need to space either of these further away from the Lip of the Flip for them to be parfocal?   trying to save myself a headache here so any and all replies so very welcome.

Link to comment
Share on other sites

You could set up platesolving and not need an actual finder in that case. Would be by far the least head achy solution since you already need a computer of some kind to do the guiding and so will have solved almost all of the troubles to set up platesolving.

What software is running the rig? Different ways to do it in each one.

Link to comment
Share on other sites

Hi Figgis

Plate Solving  doesn't remove the need for a Finder.

I gather you want to use it as a Finder and as a Guidescope, by adding a flip mirror like in this Baader image:

24Mar.thumb.jpg.470034de5807c84ed31753a13942fd73.jpg

 

"Do I need to space either of these further away from the Lip of the Flip for them to be parfocal? "

It's unlikely that the camera and eyepiece will both be in focus when fully inserted into the flip.

So as you surmise, YES.

One might need to be pulled out somewhat to get focus when the other is in focus.

Fit a "Parfocal Ring" to the pulled-out item, so that it can always be inserted at the same amount.

Michael

 

Edited by michael8554
  • Like 2
Link to comment
Share on other sites

Looking at that Pic, I gather it's the Camera end that will need a little longer than the EP, they have a 1½" Clicklock & the Polaris straight onto the t2 top.

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
  • 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.