Canon RS-60E3 Remote Switch shutter release controller 

The Canon RS-60E3 Remote Switch is a durable, 60cm (2 ft) cabled shutter release designed to prevent camera shake. It replicates your camera's shutter button for half-press autofocus and features a sliding lock for bulb exposures. 
  • Camera shake prevention: Ideal for macro photography, super-telephoto shots, and long exposures where touching the camera body causes blur. 
  • Two-stage operation: Half-press to activate autofocus/metering; full-press to trip the shutter. 
  • Shutter lock: Slide the button forward to lock it down, allowing for unattended continuous shooting or long "Bulb" exposures without holding the button. 
  • No battery required: Powered directly by the camera body
Compatibility
It only fits Canon cameras with an E3 terminal.