The invention relates to a camera system, in particular for a vehicle. The camera system (5) has at least the following: a lens (8) for detecting a detection region (18), an image sensor (10) for outputting image signals (S1), and an optical attachment (16) which is arranged in the detection region (18), said optical attachment (16) together with the lens (8) forming an optical imaging system (17) for imaging a two-dimensional detection region (24) on the image sensor (10). The optical attachment is formed by exactly one lens attachment (16) with an inlet surface (16b) and an outlet surface (16a), and the two-dimensional detection region (24) does not run perpendicular in relation to the optical axis (B) of the lens attachment (16) and is sharply imaged on the image sensor by the optical imaging system (17). The inlet and outlet surfaces are preferably not spherically curved.