M31, the Andromeda Galaxy, with its companion galaxies, M32 (below) and M110 (aka NGC 205, above), framed to include the blue star Nu Andromedae at left, usually used as the star hopping guide star to find M31. This is a stack of 4 x 6 minute exposures with the Quattro 8 inch Newtonian reflector astrograph, using the Canon 5D MkII at ISO 800, taken from home.
M33 Galaxy, with 5-inch apo refractor at f/6, with Canon 20Da camera at ISO 400. Stack of four 16-minute exposures. Taken from home on Nov. 20, 2006 on a superb night, very transparent and no aurora at all. Near perfect night. Guidetstar was lost for fifth exposure -- wind blew dewcap in front of eFinder guider lens. And seeing bloated up a bit more for the 2 to 4th exposures.
The Local Group spiral galaxy, Messier 33 in Triangulum, with some of its star forming nebulas showing up as green-blue Oxygen III regions in its spiral arms. This is a stack of 30 x 6-minute exposures, with the Starfield Optics Géar115 f/7 apo refractor taken as part of testing the scope, with its 1x Adjustable Field Flattener for the scope's native 805mm focal length, and with the stock 45-megapixel Canon R5 at ISO 1600. Autoguided and dithered with the MGEN3 autoguider on the Astro-Physics Mach1 mount. No dark frames or LENR applied on this chilly night in December 2022. Noise reduction with RC-Astro Noise XTerminator; star reduction with RC-Astro StarShrink. Galaxy details were enhanced with applications of: a masked High Pass Sharpen filter, Starizona's Galaxy Enhance action, and PhotoKemi Dark Details action. All stacking, alignment and processing in Photoshop.
