Robot-Berning also produced enlarged versions of the Robot, the Robot Royal 18, 24 and 36, with built-in rangefinder and with an autoburst mode of operation capable of shooting 6 frames per second. The camera was about the size of a Leica M3 and weighed almost 2 pounds. It was equipped with a Schneider Xenar 45 mm f/2.8 lens. The Robot Royal 36 took a standard 35 mm still picture but was identical to the Royal 24 in all other regards. They retained the behind-the-lens rotary shutter with speeds from 1/2 to 1/500 s.