| | | Type A | shoe-mount unit | | | 4mm height, for Leica-M-cameras and previous models 2 - 3 F, E, C | | | | | Type B | shoe-mount unit | | | 7mm height, for Nikon S-type Viewfinder-cameras and previous Contax-models | | | | | Type C | shoe-mount unit | | | 10mm height, for Bessa and the first Leica camera models. | | |