The RTF-104G1 was an all-weather day and night reconnaissance development of the TF-104G which was proposed to meet a Luftwaffe requirement. The RTF-104G1 was to carry photographic cameras, infrared sensors, and was to be equipped with sideways-looking radar. The RTF-104G1 was not proceeded with because the Luftwaffe selected the McDonnell RF-4E Phantom II for this mission.