Meade LX90 8" UHTC at ~f5 on HEQ5, QHY5 on Meade finderscope, Baader Alan Gee II Telecompressor, Canon 1000D modified, Astronomik CLS-CCD filter, APT,PHD, EQASCOM, CdC.
Processed in Deep Sky Stacker, bilinear de-bayering, Kappa-sigma stacking (kappa 2, iterations 2). 1hr 15mins in 300s subs.
Full size. (http://www.ancientlight.amateur-astronomy.org//images/M101_RotherValley_20120527.jpg)
(http://www.ancientlight.amateur-astronomy.org//images/M101_RotherValley_20120527_sm.jpg)
well i think you are very happy with your trio, Duncan, you did very well
M101 is not easy - especially those really faint arms.
It needs a lot more data than 75 minutes!!
A good start though.
Mark
I'd say that was pretty good for 75 mins of data but there's a bit of a wierd colour cast - too much green I think.
Robert
Thanks for the kind comments. I knew it was a dim target so I planned 20x 300s and 10x600s though the 10 minutes subs would be finishing after it started getting light. But the guiding stopped. :cry: Everything else kept working except the ASCOM connection to the mount.