Attention: The Nikon Speedlight SB-16 consists of two parts: the main flash unit and the flash unit coupler having the mounting foot. Depending on which type is attached, the flash unit is identified as the Speedlight SB-16A or SB-16B. The SB-16A's Flash Unit Coupler AS-8 has a special mounting foot for the accessory shoe of Nikon F3 series camera, while the SB-16B's Flash Unit Coupler AS-9 features a standard ISO-type mounting foot. As shown in the table, the SB-16A and SB-16B can be mounted on any type of Nikon camera either directly or with the use of another Nikon Flash Unit Coupler. Usable shooting modes, however, are limited according to the combination of the flash unit and camera.