About Sea & Sea M52-M62
The Sea & Sea M52-M62 Step Up Ring's diameter on the camera/housing side is 52mm and the diameter on the lens side is 62mm. The Close-UP Lens 125 can be mounted with this ring. This ring is made up of Corrosion-resistant aluminum alloy material. When the Close-UP Lens 125 is mounted, the depth of field will be narrowed.