Comet Holmes is fascinating because if has changed so quickly. Here are two images taken three days apart with the same technique, equipment and to the best of my ability processing. What a difference three days makes! Jim TEC APO 140 Losmandy G-11 Starlight Express SXV H9 FLI Filter Wheel Astrodon LRGB filters Maxim DL Photoshop CS 15 (1) minute LRGB, background stars and comet aligned and processed separately, then re-combined in Photoshop as a final step.