X-Pro 1 Diopter (Power -2) Providing adjustment for differing prescriptions, the Fujifilm Diopters are designed to fit the FUJIFILM X-Pro 1 perfectly & simply screw in to place of the diopter supplied with the camera. High quality glass ensures viewing quality is maintained. The diopters are available in 6 different powers (+3, +2, +1, 0, -1, -2, -3) & have the power laser etched on to the glass for easy reference.