CamDive Wide Angle Wet Correctional Dome Port Lens for Underwater Housings  (67mm Round Adapter) and CamDive Red Underwater Dive Filter Amplification co-eficient: X0.7(Underwater),The design of optical glass and antireflective coating-film makes the image perfect without distortion. Correctional lens can't be used with inbuilt flash of the camera inside housing! Equipped with M67 thread. Maximum Depth 60M/195ft. ATTENTION! - This accessory will not work with Sony A7 II underwater housing!!!