This Olympus dome lens port is for the Zuiko 8mm fisheye and 7-14mm zoom lenses when used on the Evolt E-300 digital camera in the PT-E01 housing. The 7-14mm zoom lens requires port extension PER-E02 (not included).
This lens is ideal for underwater photography since it has an angle of view of 110 to 70° and will focus as close as 3.5" (9cm). This allows you to get closer to your subject producing photos with better color, contrast and detail.
The port is die-cast aluminum with quality glass to ensure security and high-end performance to a depth of 196' (60m).