Quote:
Originally Posted by Slawomir
Hi Lee,
You could compare focus visually with a Bahtinov mask on a bright star at the beginning and at the end of imaging session on a night when temperature will change at least a few degrees, if you wanted to know for sure  |
Good thinking, thanks mate. I thought of this, as I usually do, after I'd already packed up and was on my way back to the house. I should also take note of the focuser position to reduce the likelihood of focus slip being the cause.