APT Deep Dive - Manual Backlash Measurement with Bahtinov Aid
Channel: Southern Cross Amateur Astro
Date: 29/12/2023

There are a number of ways to try & measure or calculate the backlash of your focus motor & here is the method that I think may be the best if done under good sky conditions. It is also a method that allows you to measure both inwards & outwards backlash effectively if you desire - there really shouldn't be much difference between the two.

APT Links
Homepage: https://astrophotography.app/
Forums: https://aptforum.com/phpbb/

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Ivo Stoynov (APT creator) "Focusing A to Z" talk on The Astro Imaging Channel:
https://www.youtube.com/watch?v=OzvZCvz0t4Q

The Astro Imaging Channel:
https://www.youtube.com/@TAIC