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M42
The following image is a composite of images taken at intervals of 10
seconds, 30 seconds, 1 minute, and 2 minutes for a total exposure time of 50 minutes to create an image of high dynamic range. The reason for the different exposure times is that the core of the nebula is exceedingly bright and tends to get washed out in long exposures, while the faint, wispy reflection nebulosity and the deep colors of the emission nebulosity require longer exposures. By combining and processing the exposures in a complex procedure, I managed to preserve most of the detail of the core (including the trapezium stars) while bringing out a lot of faint details in the extended portion of the nebula. It isn't perfect (the seeing was also poor but you take what you can get), but it is my best effort with this object to date: Camera: Hutech Modified Canon T1i with Baader Coma corrector and Baader UV-IR cut filter Equipment: 200mm f5 Modified Konus Newtonian OTA Losmandy G-11 GEM with Gemini Go To 80mm f5 Orion Shorty Autoguide scope with Orion Star Shooter autoguider Losmandy heavy duty tripod. Conditions: Transparency - Good Seeing - fair Temperature - 20 Degrees F |
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