NGC 6528 (left) & NGC 6522 Globular Clusters in Baade's Window, in Sagittarius. Taken July 2, 2007
with a DSI Pro II and Outback Cooler on a C80ED operating at f7.5. RGB subframes were 30 sec.
resulting in the following total exposures R:G:B (min) = 20:17:17. 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.