Possible to train PEC with autoguider instead?
Posted 27 July 2009 - 01:38 AM
Instead of doing this procedure, can I just hook up an autoguider to it and autoguide the PEC on a star for the most accurate recording?
Posted 27 July 2009 - 03:37 AM
It will map out your PEC, then create a PEC curve to fix your errors, then upload it to the mount.
You can also just use your ccd to do the PEC as well, but no where as good.
Posted 27 July 2009 - 12:56 PM
I have used the autoguider to train PEC and it worked fine. Pempro would probably be the better choice, I just purchased it myself, but this method will work. I would suggest you set the exposure frames at 3-5 seconds to avoid chasing seeing however.
Posted 27 July 2009 - 07:49 PM
Posted 27 July 2009 - 08:53 PM
Your main question was - can you autoguide instead of manually correcting when recording PEC - and the answer is definitely yes. I don't know any benefit of doing it manually. Just get your autoguiding tuned well, and have the mount pretty well polar aligned so there is little dec. drift - and then record the PEC for playback. It is advisable to average many worm turns somehow if possible. I don't know what software options you have to do that with your mount, though. Celestron mounts have a free tool called PECTool that does it. There may be similar options for your mount.
Posted 27 July 2009 - 11:51 PM
Posted 28 July 2009 - 08:29 AM
This delay adds to your dilema, so instead of fixing PEC, it may extend it. Some programs allow you to time shift a little so as to align the actual PEC with the correction.
Remember, PemPro is free for 60 days, so use it and never worry about it again.
Posted 28 July 2009 - 08:55 AM
Posted 28 July 2009 - 09:00 AM
If you train with long exposures and each image has a second or more download time - I agree there would be problems and the eye/hand might be better.