Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

stargazine_ep34_banner.thumb.jpg.28dd32d9305c7de9b6591e6bf6600b27.jpg

Recommended Posts

Hi all,

I have bought a laser colminator and have tried to use it.....just wondering if anybody can tell me why the red dot which is bouncing back onto the target on the collminator itself is not a small dot like in all the tutorials I have watched......mine is very a large faint dot which covers the entire target?

Thanks

Dan

Share this post


Link to post
Share on other sites

What scope do you have? Is there a lens built into the focuser?

Share this post


Link to post
Share on other sites

You should see a sharp intense dot in the center of the target if it's collimated well. Your collimator itself might need collimating first. The tool has to be right before it can be used - it's a bit like having a drill bit that's not centered in the chuck. Hth :)

Share this post


Link to post
Share on other sites

Yes I believe there is....I have got a visionary Mira ceti 150

This appears to be a Bird-Jones and are notoriously difficult to collimate.

Share this post


Link to post
Share on other sites

If your mirror has a centre spot then you may be able to collimate the primary by looking for the shadow of the centre spot on the target as done with a barlowed laser collimation.

I believe that to fully collimate a Jones-Bird you would normally start by disassembling the focuser in order to remove the lens which creates the extra difficulty.

Share this post


Link to post
Share on other sites

If it is this one http://www.clearviewbinoculars.co.uk/acatalog/Visionary_Mira_Ceti_1400_150.html aperture 150, focal length 1400, then you won't be able to collimate the telescope with a laser. Either use a cheshire eyepiece or a colli-cap   http://www.firstlightoptics.com/other-collimation-tools/cheshire-collimating-eyepiece.html and http://www.firstlightoptics.com/other-collimation-tools/rigel-aline-collimation-cap.html

Share this post


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

By using this site, you agree to our Terms of Use.