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Image ID: ngc7000-c07.10.2005-SigAvg13.v1.3-700.jpg
TITLE=The North America Nebula in Cygnus
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The North America Nebula in Cygnus is a mixture of emission, reflection, and dark nebula on our own 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). Data were recorded in raw mode, 75 second exposures, and 13 exposures were added in ImagesPlus using raw files converted to linear output by ImagesPlus 2.5. Total exposure time = 16.25 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 nebula digital_astro
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Last updated October 05, 2008