Guest peepshow Posted May 10, 2015 Share Posted May 10, 2015 I have been experimenting............now that I am imaging in my warm bedroom ! This is a seven minute sub using Stellarium only to guide an EQ3pro WITHOUT using PHD etc !! I was very surprised how good the tracking was, although there is some star elongation. This image was taken at 10 o/clock last night on approx. Az 140 / Alt 58. So for imaging of about 2 minutes or less I shall not use my QHY5 ll for guiding. Just let Stellarium get on with it, [/url] Link to comment Share on other sites More sharing options...
glider Posted May 10, 2015 Share Posted May 10, 2015 If all else was perfect then I guess Stellarium could control the track rate of the mount to keep things round. But it's errors in the gears after the motor that give rise to the real problems. You can only correct that by having a secondary guide scope setup to feed back corrections to the motor controller. Having said that I can get 2 minutes out of my grab and go EQ1 with a clock motor and DSLR. Your field of view does you a favour. With a smaller chip CCD you'd struggle. stash 1 Link to comment Share on other sites More sharing options...
Guest peepshow Posted May 10, 2015 Share Posted May 10, 2015 I have 1 minute subs taken in this way and the stars are perfect. Maybe my gears are not too bad after all. I shall try various parts of the sky to see how it performs there. Stellarium gets rid of all that palaver of calibration, which wastes minutes of precious imaging time. One other very great advantage is that if a cloud comes over, whereas before, PHD lost the star, Stellarium never does !! Just click on an object, hit cntl+1, quickly slew to it, and one's away. Link to comment Share on other sites More sharing options...
Guest peepshow Posted May 10, 2015 Share Posted May 10, 2015 (edited) Yes Glider, I forgot to mention that the wide FOV favours the result. My lens is 200mm on a DSLR. The RA axis is weighted to the west, not the normal east. Edited May 10, 2015 by peepshow Link to comment Share on other sites More sharing options...
glider Posted May 10, 2015 Share Posted May 10, 2015 Well if it works don't mess with it. Link to comment Share on other sites More sharing options...
stash Posted May 10, 2015 Share Posted May 10, 2015 I agree with Glider - just because a piece of software says its pointing at a coordinate means nothing until it is confirmed by real time feed back preferable from another accurate/speedy source - the latter being another set of problems. I would never 100% trust my Sat Nav just like I wouldn't trust my wife's navigation/map reading skill's - come to think of it I listen to my Sat Nav more than the wife. Link to comment Share on other sites More sharing options...
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