The 1.4 x viewfinder magnifier turns into magnification of 1x (0.95x with M8 Models); this combination allows comfortable viewing of the subject with both eyes. The viewfinder is simply screwed into the viewfinder ocular of the Leica M. A small chain attached to the Leica M's carrying strap eyelet prevents it from being lost or damaged. A leather pouch is supplied for safekeeping when it's not attached.