Quote:
Originally Posted by gregbradley
I did a full new callibration run the other night. I adjusted the PA just the small amount it said to. I ran another large model this time 330 points. It took about 3 hours to do (perhaps my 10 second exposure length at 3x3 binning is too long).
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I would say you can significantly reduce this time. Personally i use 9x9 binning (STL11000) with about 2 sec exposure for about 240 odd points an hr. You could easily do this with you gear Greg with bigger aperture and a more sensitive camera. maybe you need to tweek your image link parameters.
Quote:
Originally Posted by gregbradley
But then when I did my normal PEC autoguided image there was a noticeable improvement in the roundness of the already quite good stars. Everything was tighter and the final image will show better resolution and sharpness because of it.
Do you find you can do a 5 minute sub with sharp round stars with just ProTrack?
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Well it seams Protrack, autoguiding and PEC are working well together for you Greg. With protrack on and i thing PEC was on, ive done 15 min unguided at 2.5m FL with round stars. This was after using a 550 - 600 point model, not a re-calibrated model. the original models have given me more success than recalibration runs in terms of Protrack unguided tracking. Pointing is spot on.
Quote:
Originally Posted by gregbradley
As far as adding to an existing model when you try to do an automated callibration tpoint run it gives you several options. Can't you just use the sync function or short mapping run if something has been adjusted manually to bring the model back to reflect the current state of the mount after physical adjustments?
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When you start up one night and you find the mount points, say, 1/2 to 1 FOV away from where it says its pointing, then you can sync back into the existing model by image linking the photograph then synching the mount to it. that's fine. This wont work if you make ANY adjustments to the mount weather it be PA or loosening or changing the scope / dovetail position on the mount. In this case you need to choose the recalibrate for portable telescope and recalibration permanently mounted telescope respectively. You select the appropriate option then do your 20 or so point recalibration run as described in the manual and this thread. It doesn't need to be super modeled.
Josh
PS, I havent yet read Peters reply to you Greg, so sorry Peter if ive repeated what you have said.