This unit is compatible with the following cameras:
- Canon 1Ds
- Canon 1Ds MARK III
- Canon 5D
- Canon 30D
- Canon 40D
It has a two-stage release button: press halfway for autofocus, press fully to release shutter and take photos; press fully and push forward to lock the button for long exposures or continuous shooting. The length of the cable is 90 cm.

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