The new PRONTO Auto-Focus Lens Adapter for Sony cameras does the unbelievable: it can auto-focus practically any lens you mount on it. Just set your Leica M lens to infinity focus and mount it onto the PRONTO. Power up your Sony camera, and PRONTO will adjust the lens' position to focus the image, all under the control of Sony's Phase Detection auto-focus system. Add a second optional adapter and you can mount and auto-focus lenses from Nikon, Pentax K, M42, and more. Compatible Cameras: Sony α7