IRIS: Dark subtraction, registration, gradient removal li>JimP: Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
CCDStack: R-L, LRGB combine
Photoshop: scaling, JPG conversion
This is NGC 6781, a planetary nebula n the constellation of Aquila. After a couple of false starts trying to figure out the new camera, scope, and mount, this one came in pretty well on a night of only average to below average seeing and transparency. A higher resolution image is available. North is up.