Comet C/2015 F3 (SWAN) on Mar 27, 2015.
Image sequence calibrated with bias, dark and flatfield in IRIS. Stacked in IRIS with registration on comet's motion. Further processed in Photoshop.
Light pollution from LA has seriously influence. Visual observation thru 20*80 bino negative, mainly because the bino are too heavy to be held without a tripod, and my hands simply trembled all the time.