M45 Star Cluster (50% resized)

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Date: 21 Septmeber 2004

Telescope: Vixen R200SS 8f4 Newtonian on Gemini G-41 mount

Guiding: ST-4 Autoguider with Celestron C80, 80mm F11 refractor on side-by-side plate.

Camera: Modified Canon EOS-10D with UV/IR blocker replaced with Astrodon Luminance filter, Baader/Celestron Coma Corrector, IDAS LPS

Location: Tai Mei Tuk, Hong Kong

Exposure: 5 x 10mins ISO400 RAW

Software: The 10D in manual (bulb) mode was controlled by DSLR V3.0 during acquisition, image processed by IRIS v4.18  and final brightness adjustment in Photoshop.

Comment: I was collimating the scope, so there was coma at corner.