BIkelite W-30, 0.59x Wide-Angle Conversion Lens with a 67mm Mounting Thread. ReviewbP PP Ikelite W-30, 0.59x Wide-Angle Conversion Lens with a 67mm Mounting Thread. PMagnification: 0.59xPMaximum depth: 60m (200')PWeight above water: 595g (1.30 lbs.)PWeight under water: 345g (0.76 lbs.)PDimensions: Diameter 3.8 in (96mm) x Length 2.1 in (53mm) x Depth 5.