OSC

OSC stands for “one shot color” and refers to dedicated astrophotography cameras.  For all their possible differences in pixel sizes, well-depths, total chip sizes, cooled options etc, this class of cameras all have one thing in common: The Bayer Matrix.

This is a pattern of filters that are placed over the top of the entire sensor. A filter is actually placed over the top of each pixel, and can either be red, green, or blue. These filters only allow a certain range of wavelengths through to be captured by our pixels and rejects all others. Imagine that the filters are a sort of gate, and each gate only lets through plastic balls that match the range of colours allowed by the color of the gate.