M42 Orion Nebula (50% resized)
Date: 21 Septmeber 2004
Telescope: Vixen R200SS 8¡¨f4 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
1 x 1mins ISO400 RAW for the core of M42 was overlaid with layer-mask in Photoshop.
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, layer-masked and noise-filtered in Photoshop.
Comment: I wanted to shoot more, but the batteries only lasted one hour!
Older non-layer-masked version