Techart brings AF to Leica M lenses on Sony's a7 II and a7R II

Chinese company Techart has produced an adapter that works with the phase detection AF system of Sony's a7 II and a7R II cameras to create an autofocus effect for Leica M mount lenses. The adapter ring sits between the body and the lens and uses a motor to drive the entire lens back and forth until sharp focus is found. The company claims focus is usually acquired within a second, and that the depth of the adapter can actually increase the close-focusing range of some focal lengths, allowing use...