Quote:
Originally Posted by peter_4059
Greg. How are you determining whether the camera is square or not and how are you adjusting the tilt?
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I look at the 4 corners of an image and pack the corner that is off. A bit of trial and error. You can focus the out of focus corner and see if you have to move the focus in or out. That tells you which way to pack.
The image on the screen is the same orientation as looking at the camera from behind it. So top right of screen is top right of camera looking at it from behind.
I also use CCDinspector although that is more of a guide and it can vary but its still useful.
I made a little tilt adapter today. I already have an adapter plate that is wider than the camera so it sits flat on the filter wheel face. I drilled and tapped 4 holes and used a fine threaded smallish screw in each. Now I can simply loosen the camera in the filter wheel and quickly adjust the corner that needs to be adjusted. Then take another image and then measure it in CCDInspector.
Then a 5 or 10 min exposure and measure again. Longer exposures seem to show different results to a short focus type exposure.
Its a bit of a tedious process.
Greg.