Raynox DCR-6600Pro 0.66x HD Wide Angle Conversion Lens (52mm) DCR-6600Pro 0.66x HD Wide Angle Conversion Lens (52mm). 0.66x HD Wide Angle Conversion Lens (52mm). Magnification Nominal 0.66X Actual 0.66X/Diagonal, 0.66X/Horizontal. Lens construction 3G/3E, made of optical glass lenses, all surfaces fully coated. Front filter size 72mm; Mounting threads 52mm.