thrang, were you able to achive satifactory results with BT 1886 and autocal? I tried an autocalibration with CP 2.5 and had the same results with my gamma nosediving at 60%. Last night I tried again with the same terrible result. The previous version of CP 2.4.5 gave great results with BT 1886. No dynamic iris was used. Anybody else tried this combination yet?