Product Specifications (*1)
|Outer diameter / Length (*2)||67.8mm / 66.4mm (2.7in / 2.6in)|
|Weight (air / underwater)||296g / approx.145g (10.4oz / 5.1oz)|
|Lens construction||4 elements in 4 groups|
|Focal length (air / underwater)||infinity / infinity (afocal system)|
|Maximum incident view angle (air / underwater) (*3)||179.8° / 100°|
|Body material / Finishing||Corrosion-resistant aluminum alloy / Rigid black almite|
|Glass material / Finishing||Optical glass / Both side anti-reflection coating|
|Mount thread diameter / pitch||M52 / 1.5|
|Depth rating||60m / 197ft|
Actual shooting distance (from lens surface) and camera's focus setting
[from front edge of the lens] (*5)
|Focus position (*4)|
(*1) Specification is subject to change without prior notice.
(*2) Excluding "Lock Ring"
(*3) Actual view angle (actual field of view) varies depending on zoom setting of combined camera.
(*4) Focus range / position on land (=visual distance underwater). Multiply by 1.33 for measured distance underwater.
(*5) Measured distance underwater. Divide by 1.33 for visual distance underwater.