Hello Chris,
I use the cameras default settings.
Movie rec. size - 1920 x 1080. Apparently webcams can be good for lunar and planetary imaging - but I haven't tried that.
The main part is to get a good focus - what scope are you using?
Unless you have exceptional optics then you need quite a long focal length - which makes it harder to focus.
If you get a good image you can enlarge it using photoshop - but enlarging the image does magnify any faults.
Registax should work - but you still need a good in-focus video (about 5 minutes is enough). Wavelet filters help a lot with the stacked image. When you select the reference points in registax make sure you use a frame that isn't distorted.
Regards,
Tony.
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