Jump to content


First attempt at M3 - untracked

Recommended Posts

Feedback appreciated. I recognise I need more subs at a shorter exposures but really happy with how this turned out.

100 subs

no bias or darks (just getting used to basics first!)

12800 iso

0.5sec exposures 

set up;

150p Skywatcher Explorer (750Fl)

Canon 800d


  • Like 3
Link to comment
Share on other sites

  • 2 weeks later...

Nice image! Stars are showing a bit of elongation that maybe because of slight drift or its not correctly collimated. If you are seeing elongated stars in the individual images then its collimation.

  • Like 1
  • Thanks 1
Link to comment
Share on other sites

Posted (edited)
18 hours ago, MessierMatt said:

@AstroMuni thanks for the feedback.  I have moved to 0.4 single exposure time which has reduced the elongation a little.  I'm also sure collimation is not spot on and am still practicing with this.

It seems odd that such a small exposure is causing so much drift 😞 Perhaps someone who has done imaging without tracking can comment. This may help https://beltoforion.de/en/astrophotography/camera_settings.php

Edited by AstroMuni
Link to comment
Share on other sites

11 hours ago, michael8554 said:

Hi Matt

0.5secs at ISO12800 shouldn't show drift, so I would look at collimation.

And then try longer exposures until you do see drift.


Thanks @michael8554 I will defo check the collimation. 

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.