Messier 33 Triangulum Galaxy

M33 Triangulum galaxy or the Pinwheel galaxy is 2.3 million light years away in the constellation of Triangulum. Containing about 40 billion stars its a small faint deep sky object. Difficult but rewarding to photograph at last. Captured over 2 nights using 32 Light frames, 16 Dark, 11 Flat and 10 Bias. Stacked in Deep Sky Stacker, finished in Photoshop CC. Guided using PHD2 and ZWOasi120mc camera. The 0.85 field flattener is great at making round stars right to the edge of the frame and making the scope faster, from focal length 600mm f7.5 to 510mm f6.4. Backyard EOS is a great software program for Canon and Nikon cameras. I used 120 second Exposures @ISO 1600 with an 8 second mirror lockup to settle the scope then a 20 second pause between shots to cool the dslr sensor. BYEOS also enables PHD2 to Dither between shots, helping to reduce noise when stacking.