Supernova SN2004et in NGC6946 with a 25cm Opticon SCT @ F/4.8
Comparison of two images, the one on the left was taken September 15 2004 and the one on the right on October 6, 2004
65 min. exposure (13 x 5 min) on September 15, 2004 with a 25cm Opticons SCT @ F/4.8, the supernova was not there yet.
40 min. exposure (8 x 5 min) on October 6, 2004 with a 25cm Opticons SCT @ F/4.8