- 41 Zeiss Ikon Tenax I was designed to compete against the Robot II
camera. The small body and 50 exposures in a 24 x 24mm
format with a wide angle zone focus lens.( Novar Anastigmat f3.5 /
35mm) were all the same features found on the Robot. Unlike the Robot's
spring motor advance system the Tenax has a left hand rapid advance
lever with a claimed 4 frames per second with some practice.....