The AP-602 replaces the factory tripod mounting foot attached to the rotation collar of your Canon lens. It is also an Arca-Swiss style quick-release plate, which allows you to attach your lens to a compatible quick-release clamp. It features a double-dovetail geometry, which provides extra flexibility when attaching Arca- Swiss style quick-release accessories such as Wimberley Modular Flash Brackets. Using this plate decreases the overall height of your lens so that it will handle better on a conventional tripod head, and so that it achieves proper balance when used on the Wimberley Sidekick gimbal head adapter. It is the stiffest Canon replacement foot on the market, providing less flex and greater stability than others currently offered, helping to create sharper images.