Bode's Galaxy M81

M81, also known as Bode's Galaxy. Captured on March 28 while testing the ZWO ASI AIR PLUS. Shot through a Sky-Watcher bkp2001 telescope on an HEQ-5 PRO mount with a SharpStar 0.95x coma corrector on a Nikon D5300. The total integration is modest. Stacked 81 frames at 10 seconds each, ISO 1250. Total integration time: 13.5 minutes. Separately, without the ASI AIR, I captured darks and biases, converted them to FITS using PIPP to stack with the lights, but DSS started complaining about mismatched image sizes (even though they were the same) and so on. As a result, only the light frames were stacked, without calibration frames.