All,

Here is M13 @ .61 arc sec /pixel. Taken with a 10 inch RCOS/AO8/ST-10XE Guided off axis with a MOAG. The AO8 was guiding at about 1.5 Hz and probably didn't really help much except ....... I think it's easier to move a small mirror/lens around than it is to correct guiding by moving 250 pounds of telescope and mount around. So the star sizes appear to be pretty good.

Anyway ACP once again made the data collection easy- Thanks Bob !

20 x 300s LRGB, data calibrated and stacked using CCD Stack. RGB combine done in CCD Stack, Luminance layered in using Photoshop CS. Some gradient removal was required since this was taken from an Urban location. Luminance 1x Binned, RGB 2x Binned.

http://www.celestial-images.com/Imag...300s-LRGB.html


Regards

Bill