M22 Globular Cluster
Date: 14 July morning, 2003
Telescope: Celestron 8” SCT with stabilized mirror, on Gemini G-41 mount
Guiding: ST-4 Autoguider with Celestron C80, 80mm F11 refractor piggybacked on C8.
Camera: MX916 with IDAS LPS filter, behind a Meade 0.63x reducer.
Location: Tai Mei Tuk, Hong Kong
Exposure: ~12 x 5mins
Software: Image acquisition by Astroart, calibration by AIP4win, autoaligned by Astroart, sigma-combined by Sigma, DDP by AIP4win, final brightness adjustment by Astroart.