Quote:
Originally Posted by CDKPhil
According to SB their software is supposed to average out the seeing and you should be able to achieve sub arc second PE.
But if your seeing is over 2 arc seconds is there any point in having sub arc second PE?
My uncorrected PE on the MX is around 3 peak to peak so +- 1.5
I trained the PEC but it did not make a lot of difference, I put it down to the seeing conditions.
I will have another go once the current problems are sorted with Sky X. I will keep you informed.
My image scale is .6 arc seconds per pixel, I still managed to achieve 10 min unguided without PEC.( That was with a good TPoint model and Pro Track.)
Cheers
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Hi Phil,
I can't answer your question. I guess I actually don't know what the problem is. I used to be able to guide just fine at f7, but in spite of quite a good model, excellent PA, and Protrack have never had good unguided results. Now at F14, same scope, weight, PA, etc, I just get erratic guiding, or maybe it's something else? Guiding will sometimes look excellent on the graph (say under .3 in TSX) and then it will suddenly start spiking upwards of 1 pixel or more in RA. Maybe that is just seeing, but usually it just comes and goes. Sometimes changing stars helps but more often doesn't. I was advised to try longer exposures to try to even out the seeing and lower aggressiveness. That helped some, but the longer exposures seem to result in distorted stars (6 seconds). Sometimes the stars are not so bright through the ONAG and actually need the longer exposure....so, I figured that if I improved PEC maybe my luck would improve. I guess the bottom line is I don't really have confidence in myself to know if it's my technique that is lacking, or if there might be an actual problem with the mount. I know this is a challenging hobby, but after more than a year at this I had hoped (in vain) to be further along. Sorry for the little rant. I'm just not sure how to sort through these issues. Any ideas appreciated!!
Peter