COROT's field of view

This sketch shows the field of view of the COROT telescope.

The telescope itself contains a primary mirror of 30 centimetres in diameter. It is made out of two parabolic mirrors, having a 1.1-metre focal length. The field of view is a square of 2.8 x 2.8°, half for the seismology mission, the other half for the exoplanet mission. A prism, used by the telescope for certain aspects of the mission, will separate colours, enabling scientists to study stellar activity during a planetary transit.