PICTURES TAKEN AT WINFREE OBSERVATORY
These pictures were taken with an ST-6 CCD camera. Images form within the camera on the light-sensitive surface of a silicon chip measuring 8.6 by 6.5 millimeters. (This is about the size of your "pinky" fingernail!) The chip is divided into 90,750 light-sensitive photosites. Brightness levels are electronically recorded in each of the photosites. The computer displays an image by commanding 90,750 spots on your computer monitor to glow with the correct brightness.
For the first five images listed, an f/7 focal reducer/corrector was attached to the 14-inch telescope. The telescope then became a 2490 mm telephoto lens for the camera! This combination produces an 11 by 9 arcminute picture size. (60 arcminutes make one degree.) The last image of the Orion Nebula was taken through a smaller 80 mm, f/11 guide telescope. The guidescope produces a larger 32 by 25 arcminute picture size.
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