With the Leica Macro-Adapter-M attached between the camera and an M-mount lens, the lens-to-sensor distance can be increased to allow reproduction ratios up to 1:2 for close-up shooting. It features a helical screw system, which can be used to vary the adapters extension length between 18-30 mm (0.7-1.2") for adjusting focusing distance. The adapter is designed for use on Leica cameras featuring a live view function (such as the M Typ 240) and with lenses with focal lengths greater than 28mm.