This Lens Adapter from Novoflex enables your M42 lenses to be used on Leica T and SL mirrorless digital camera bodies. It features a durable, machined construction and does not contain any optical elements in order to retain your lens' quality and also maintain infinity focus. It is a manual design that does not relay any lens-to-camera communication, so requires the use of manual focus, stop-down metering, and either manual or aperture priority exposure mode.