Generally the 'camera' of a telescope is just the sensor part while the 'telescope' is the lens part. In the case of LSST the camera module also contains some

Generally the 'camera' of a telescope is just the sensor part while the 'telescope' is the lens part. In the case of LSST the camera module also contains some corrective lenses, which serve the purpose of making the focal plane flat and correcting chromatic aberration created by the filter substrate and the vacuum window (the sensor part itself is cryogenically cooled so it has to be in a vacuum).