Continuing experimentation with Canon T1i and 10-in LX-200 (2,500mm).
Set camera to ISO 1600 and "S" setting. Took 120 15 -sec exposures, saved as JPEGs.
Deep Sky Stacker stacked 109 of these sub-frames for an equivalent exposure of 27 minutes 15 seconds. Slight curves enhancement in DSS, TIFF image imported into MaximDL where it was binned 3x3 and stretched to 8 bits and saved as JPEG.