From the Manufacturer A compact remote switch with a 2.6-foot (80 centimeter) cable to prevent camera shake for super telephoto shots, macro photography, and bulb exposures. Handy for taking pictures of subjects that are difficult to approach, or to minimize vibration for close-ups and time exposure. The remote switch works just like a shutter button, enabling halfway or complete pressing. It also has a shutter-release lock. With the EOS-3's Custom Function No. 12 (mirror lockup), camera shake can be further reduced. Compatible with Canon models EOS-3, 1V HS/1V, 1D, 1Ds, 1D Mark II, 10D, 20D, D30, D60, and D2000. Product Description A compact remote switch with a 2.6 feet (80 centimeter) cable to prevent camera shake for super telephoto shots, macro photography and bulb exposures. Handy for taking pictures of subjects that are difficult to approach or to minimize vibration for close-ups and time exposure. The remote switch works just like a shutter button, enabling halfway or complete pressing. It also has a shutter-release lock. With the EOS-3's Custom Function No. 12 (mirror lockup), camera shake can be further reduced. Its quick-lock plug connects to the new N-3 type remote control socket