1. A device comprising: an image sensor having a 2-dimensional pixel array capable of providing images from at least two rectangles defined on the image sensor, the rectangles each having a first side that is perpendicular to a second side, the first side of each rectangle being parallel to the first side of the other rectangles, the second side of each rectangle being parallel to the second side of the other rectangles, a ratio of a length of the first side to a length of the second side being different for each of the rectangles, each of the rectangles having the first side longer than the second side; and a lens configured to generate an image circle having a fixed diameter on the image sensor such that a perimeter of the image circle concurrently contacts each vertex of each one of the rectangles.