An assembly of 14 diffraction limited collimators project beams, up to 12 in. (30.5 cm) in diameter, into the aperture of an aerial camera under test. USAG 1951 targets, both standard and Cos/Cos2 corrected, are provided for off-axis angles of 0° to 60°. The collimators, targets, and camera are mounted on a rigid, isolated, vertical frame, 29 ft. (880 cm) high and 28 ft. (850 cm) wide. The building and air-conditioning requirements are also discussed.