John Greengo

"While focusing your camera seems like it should be a no-brainer--there's autofocus, after all!--it's often not a simple task. Depending on the shooting situation, your camera, and the countless scenarios that can "throw off" the focus, the task of achieving sharp images with great focus can be deceptively challenging. If you're a passionate photographer eager to learn the best ways to achieving focus in every shooting situation."--Amazon.