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Image ID: m31.c07.10.2005.Avg23-75s-v1.6-700.jpg
TITLE=The Andromeda galaxy, Messier 31
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The Andromeda Galaxy, M31, is a spectacular large galaxy and close to the Milky Way.
Camera: Canon 1D Mark II 8-MPixel digital camera, set at ISO 800. Lens was a 5-inch aperture, 500 mm focal length F/4 (Canon's 500 mm f/4 IS L telephoto lens) with a 1.4x teleconverter giving 700 mm at f/5.6. Data were recorded in raw mode, 75 second exposures, and 23 exposures were added in ImagesPlus using raw files converted to linear output by ImagesPlus 2.5. Total exposure time = 28.75 minutes. Processing included light fall-off correction and dark frame subtraction in ImagesPlus. Contrast stretch in ImagesPlus using digital development and in Photoshop using curves and levels. Image restoration using ImagesPlus Richardson-Lucey deconvolution.
Image guided with an ST4 autoguider on a 3-inch f/8 refractor and a Losmandy G11 mount.
Keywords to this image = astrophoto-1 galaxy Messier night low-light digital_astro
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Last updated December 26, 2011