ISO 518:2006 Preview
Photography -- Camera accessory shoes, with and without electrical contacts, for photoflash lamps and electronic photoflash units -- Specification
This standard was last reviewed and confirmed in 2015. Therefore this version remains current.
ISO 518:2006 specifies the dimensions of camera accessory shoes, with and without electrical contacts, for photoflash lamps and electronic photoflash units. The dimensions given are basic for the solid shoe. When an accessory shoe is equipped with springs or other devices for holding the accessory foot tightly or maintaining good electrical contact, the dimensions of the shoe can be changed within the range in which their interchangeability and functions will not be affected
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