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it might help to know the rough position of the focal plane first. Aim the scope at a nice bright subject (not the sun - just an outside scene will do), then without any eyepieces and with the focuser (if any) racked all the way in, then see if you can get an image in sharp focus projected onto some tracing paper. This is the focal plane. Make a measurement so you know where it is then try the webcam sensor at the same distance.
You might also need to adjust the webcams exposure settings to get a better image....
Can anyone else offer any suggestions??
Adam
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