On my third imaging session I have been experimenting with binning. This image was made with 2x2 binning. Because the ST-7XE main CCD doesn't have many pixels to begin with, then resulting image is rather small. However, the sensitivity for each pixel is increased fourfold, and the well depth twofold. For LRGB imaging and photometry this will certainly have its uses. In this case, with normal binning I would only have reached the depth of this image after 42 minutes, instead of the 10.5 minutes used here.
2003-01-18: 630s 2x2 binned exposure (21x30s). Camera cooled to -30°C.
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