M100 in Esprit120

This is a test image taken from a dark sky site. Unfortunately the Moon came up after only about 28 minutes limiting the total exposure. Still, it is substantially better than my last effort on this target using an older eight inch Meade Schmidt Newtonian. Click on the image to see the older version which is an hour long exposure and click again to return to this image. Scrolling down is a crop of the main galaxy along with some fainter companions.
Object Object RA 12:22:55 Dec +15:49:19
Exposure 28 minutes (4 X 7 Minutes)
ISO 1600
Camera Canon 60Da DSLR
Optics 120 0mm SkyWatcher f/7 SkyWatcher Esprit120 APO refractor

SCO, St. Croix, Nova Scotia


This image was processed entirely in Images Plus. Calibration, stacking, statistical filter applied to reduce noise before stretching. Masked stretching and split star processing used to enhance the image. Masked noise reduction using a frequency domain low pass filter applied to the DSO layer and then it was recombined with the star layer. Image binned 2 by 2. Final sharpening applied. Since the Canon 60Da has on sensor dark current suppression, no darks and a synthetic bias were used in the calibration.