M3 (NGC 5272), Globular cluster class, in Canes Venatici. Taken May 25 and June 1, 2007 with a DSI
Pro II and Outback Cooler on a C80ED operating at f7.5. RGB subframes were 60sec resulting in the
following total exposures R:G:B (min) = 41:45:47. Color balance was achieved via numerically
scaled channels. Captured with Envisage, calibrated and sigma combined in Iris with other processing
using FITZ, PixInsight LE and Photoshop CS. North is up.