The entire constellation of Orion is a star making factory, and the heart of the activity is centered around the Sword - the three "stars" below the hunter's famous belt. In fact, only one of the stars in the Sword is just a star (Nar Al Saiph, top left), while the others consist of the Great Orion Nebula (M42) and the stars of the Running Man Nebula (NGC 1977). All three are enmeshed a deep crimson sheet of ionized Hydrogen, with sprinklings of greenish oxygen and bluish reflection nebula around the main components.
No problem! I used A Losmandy G-11 Gemini tracking mount to keep me on target, and the telescope I was shooting with was a Takahashi Epsilon 130 (430mm f/3.3 hyperbolic astrograph). The camera was an SBIG ST-4000 XCM 4.2 MP color CCD camera - no real ISO setting, but it's roughly ~ISO 6400 equivalent while the camera's cooling system gives a noise level closer to ISO 200-400. I shot 12 exposures of 20 minutes each and 6 exposures of 30 seconds each to mask in the highlights. Stacking the exposures was done in MaxIm DL, and processing and masking was done in Photoshop CS2.
Thanks for the reply. Great gear and even greater photo. One quick question, are you using only Losmandy G-11 for tracking without an autoguider? Im new to astrophotography, so this question might be dumb
Not at all! The SBIG ST-4000 XCM camera has a built in 2nd CCD for autoguiding. I was autoguiding through this shot, though I had to stop halfway through to flip the mount over to the other side of the sky and reacquire the guide star. That caused the slight misalignment of the diffraction spikes on the brightest stars.
check it out
[link]
Single photo exposure time, iso etc.
question, are you using only Losmandy G-11 for tracking without an
autoguider? Im new to astrophotography, so this question might be
dumb