The INON "UCL-G165 SD" underwater wide close-up lens enables you to shoot a subject from close range of the lens with deep depth of field thanks to GoPro®’s deep-focus characteristic.
■Compatible model
HERO4
HERO3+
HERO3
HERO 5/6/7
●Get Closer Minimum Focus Distance
A GoPro® camera is a deep focus camera which does not require focusing but prevents a subject gets in focus within 60cm/2ft range (air) in theory thus not usable for underwater macro shooting. Using standard macro lens for a compact digital camera would not help the situation as it would create vignetting and very shallow depth of field preventing comfortable focusing. The UCL-G165 SD lens is so-called "wide close-up lens" specifically designed for GoPro® cameras based on its optical characteristic supporting closer minimum focus distance underwater enabling high magnification/close-up imaging. The depth of field (DoF) underwater will be 5cm/2.0in to 35cm/1.1ft for GoPro® HERO4/3+ or 7cm/2.8in to ∞ for GoPro® HERO3.
* The depth of field (DoF) on land is theoretical value based on focal length/aperture of camera lens and pixel pitch of the image sensor. DoF underwater is measured from "the forefront of the lens".
http://www.inon.jp/products/gopro/uclg165sd.html
