I was getting ready to take out my Kodak Retina 1b and Voightlander Vito II, and was playing with the hyperfocal scales. On both cameras the scales are one stop off. So for f8 the hyperfocal distance should be about 34 feet. But on both cameras this distance is shown for f5.8. Checking an OM 50mm showed the correct hyperfocal, about 34 ft at f8.

Why would both the Kodak and the Voightlander be off by one stop? Was it one stop of insurance to make sure everything was in focus?