Astrophotographer living near Grenoble, France. Binning is very useful e. The disadvantage of CCD technology is the fact, that electrons in pixels are generated not only by incoming light, but also randomly, depending on the chip temperature and also on pixels size, chip architecture and production technology. The way a CCD array transforms an image into a computer file is quite simple in principle. Information about charge accumulated in each pixel number representing number of electrons and thus number of detected photons then creates image data file.

If the telescope focal length is too long for pixel size e. Bias frames are used to interpolate dark frames of different exposure times. Astronomy by Rob Johnson — Contains images, night time weather statistics, gas hypering, and a freeware ephemeris program. Not only in astronomy, but also in overall photography films become outdated within several years. Home Built Astronomy Projects.

For imagng planets I have also used Webcams and video cameras. Placed at the prime focus of even very modest small aperture telescopes, a good CCD camera can produce breathtaking colour images that far outstrip anything that can be produced with a similar instrument using film, or that can be seen visually. Click here for latest pictures. Basically there are two methods of applying filters to get color image:. By applying various voltages to various electrodes, electrons can be poured from one well to the neighboring well.

Control by Software for Amateurs Mel Bartels. It is not known if the increased activity of the NEB is related to the festoons becoming more prominent. Christopher J Picking. The term binary refers to the base 2 number system used. Here it can be seen as a round lighter area in the lower middle portion of the image. Without this feature, a bright star which has saturated the pixels will cause a vertical streak.