The Pro Mouth Switch is the newest still camera switch. This switch, manufactured by Sonic of the Ranch PRO Shop in New York, features a unique mouth-operated switch. It is operated by placing the PRO Mouth Switch between your tongue and the roof of your mouth. You then press it with your tongue.
Standard Switch is compatible with the Canon Digital Rebel 300D, Canon Digital Rebel XT 350D, 400D, 450D Canon Rebel film cameras, and any other cameras using a 2.5mm plug. This switch is also compatible with the HypEye D Pro Expansion Kit. Length of the switch wire is 32".
This Digital Plug switch is compatible with the Canon: D30, D60, 10D, 20D, 30D, 5D, D1, D1 Mark II, Ds1, and Ds1 Mark II as well as other Canon cameras using this type of digital plug.
Note: This model of the Pro Mouth Switch is configured for fast-action photography. If you’re using auto focus, make sure your focusing mode is set to "Al Servo" for proper functioning. If the Pro Mouth Switch is plugged into your camera it should start focusing as soon as the power is turned on. O: AE/AF AE lock. This setting can be found at: Menu -> Custom Functions -> Shutter button/EA lock button. Length of this switch cable is 32".