Messier 52 open cluster in Cassiopeia (upper left) and NGC 7635, the Bubble Nebula (centre). Taken from home, Oct 7, 2013 with TMB 92mm apo refractor and Borg 0.85x flattener/reducer for f/4.8 and Canon 5D MkII (filter modified) at ISO 800 for stack of 5 x 15 minute exposures.
Messier 52 open cluster, at left, and the Bubble Nebula, NGC 7635 below and to the right of it, at centre, plus the small red nebula NGC 7538 at right. The open cluster at lower right is NGC 7510. All in Cassiopeia. This is a stack of 8 x 6-minute exposures at ISO 1600 with the Canon EOS Ra camera and Astro-Physics Traveler apo refractor at f/6 with the Hotech field flattener. No LENR employed as the temperature was -15° C.
