This 75mm lens was used with the 16mm Data Acquisition Camera (DAC) manufactured by J. A. Maurer Company for the Apollo program. DACs were used in both the command and lunar modules during the program, and this lens was tested on the first circumlunar mission (Apollo 8) and again on the first test of the lunar module (Apollo 9). The command module version camera, lacking a window mount found in the lunar module versions, was used to gather information during technical procedures such as undocking and redocking the lunar module (only for Apollo 9).This camera was transferred to the Museum from NASA in 1977.