Andromeda 400 mm
Another attempt at Andromeda, this time with my 400 mm and a tracking mount! (Using a dovetail adapter on a 4SE computerized mount, nothing fancy.) I stacked about 55 exposures, using 13 seconds, f/2.8, ISO 3200 per exposure. Total integration time is around 11.5 minutes. Wasn't the best viewing conditions, and combined with [alt/az] tracking errors, wind, and possibly slightly inaccurate focus, has resulted in slightly blobby stars. Still pleased with this image, and looking forward to next attempt!