The diopter stage can be used at the back of a 6.6x6.6 clip-on a matte box, or independently with a rear-mounted clamp adapter. Diopters up to +3 can be fitted, and the position of split diopters can be adjusted with an integrated friction wheel. As with the diopter frame, a safety device and 1/4 mounting threads are included. Compatible with LMB 6x6 and LMB-6.