The Polar Pro Red / Macro Combo Filter snaps on over the lens port of the GoPro HERO3+ Waterproof Housing. It features two filters. A red color-correction for blue water and a swing-away macro lens.
Compensating for loss of red light as you go deeper, the red filter is designed maintain proper white balance and natural-looking colors while diving in tropical or blue water. The filter works best at depths between 10 and 80' and is made of scratch-resistant optical glass.
The macro lens, sometimes called a close-up filter, significantly reduces the close-focusing distance of the GoPro. It allows you to achieve sharp focus on subjects between 3 and 18" from the lens; after 24" the macro should not be used. A swing-away design allows you to flip the macro lens out of the way when not in use, keeping the red color-correction filter in place.
The filters feature a tether cord to help avoid loss while diving, and a microfiber pouch to store them in.
Polar Pro Red / Macro Combo Filter for GoPro HERO3+ Waterproof HousingTether CordMicrofiber Pouch