Critical to macro is accurate focusing, which is assisted by the speedy Direct Drive Super Sonic wave Motor present in the 90mm lens. Users also have direct access to a focus hold button and focus range limiter for further optimizing the lens' performance in certain situations. On top of this, the focusing ring slides for immediate switching between manual and auto focusing. And, the lens has built-in Optical SteadyShot image stabilization for compensating for camera shake at all focusing distances.