“Whirlpool”, Spiral Galaxy, Canes Venatici
Mag 8.4 Size 11.2′ x 6.9′
200mm f8 RC
Piggyback guiding with 70mm f/7 refractor
L 10×240s 2×2, RGB 10×120s 4×4 Darks Bias Flats
Atik 460EX (-25C), LRGB filters, IDAS P2 LPR filter
Captured in APT, Processed in Nebulosity3, PS CC, LightRoom

Best clear night for a while. Quite transparent and still.