The Pro PRONTO Autofocus Adapter for Leica M-Mount Lens to FUJIFILM X-Mount Camera from FotodioX is designed to allow manual focus Leica M-mount to operate with autofocus functionality on select FUJIFILM X-mount cameras. This adapter supports infinity focus, and can also improve near-range portraiture by allowing the lens to focus closer than its native minimum focus distance. By placing space between the camera body and lens, focusing distance is shortened and the effect of magnifying the subject is created. Additionally, the adapter can be combined with separately available lens to Leica M-Mount camera adapters to enable the use of other lens types on a FUJIFILM X-mount camera.

For autofocus control, this adapter features a built-in helicoid that extends and retracts a compatible lens based on the connected camera's contrast detection AF-S type autofocus. The PRONTO autofocus adapter is constructed from aluminum alloy, and utilizes a brass lens mounting ring to provide a durable, yet lightweight camera-to-lens connection. It supports lenses up to 1.5 lb.