What a CPL Filter Does for Your GoPro
A circular polarizing (CPL) filter screws onto your GoPro lens to control how light enters the camera. It darkens skies, cuts reflections from non-metallic surfaces like water or glass, and saturates colors for better contrast. The effect is visible through the viewfinder and changes as you rotate the filter ring.
The Fotodiox Pro WonderPana Go Circular Polarizing Filter is made for the GoTough WonderPana Go Filter Adapter System. It uses a 53mm female thread and is built with premium anodized aluminum and optic-grade organic glass.
How to Attach the CPL Filter to Your GoTough Housing
Before you start, confirm which GoPro housing you have. The WonderPana Go system uses two different filter adapters depending on your case type.
- Identify your GoPro case: Use the WonderPana Go H3 Filter Adapter for the standard HERO3/3+/4 housing case (not the HERO3+ Slim Case). Use the WonderPana Go H3+ Filter Adapter for the HERO3+/4 Slim Skeleton Housing (not the HERO3 Standard Case).
- Attach the filter adapter to your housing: The adapter snaps or screws onto the front of your GoPro case. Once it's secure, the 53mm female thread on the adapter is ready to receive the CPL filter.
- Screw on the CPL filter: Thread the Fotodiox Pro WonderPana Go CPL filter onto the adapter. Turn gently until it stops—do not overtighten. The rotating ring on the filter should move freely.
- Adjust the polarization effect: Look through your GoPro's viewfinder or monitor and rotate the filter ring until you see the reflection dim or colors become richer. The filter factor varies (approx. +0.3–1.3 stops) depending on rotation and light direction.
When to Use the CPL Filter
The CPL is most useful outdoors in bright conditions. Use it over water to remove surface glare, through windows to see inside without reflections, and in snowy or hazy scenes to boost contrast. It also helps when shooting foliage or wet surfaces by cutting specular highlights.
Because the filter reduces light by about one-third to one full stop, it works best when there's plenty of ambient light. In low light or indoors, you may need to remove it to keep your shutter speed fast enough.
Fotodiox Pro WonderPana Go CPL Filter at a Glance
- Fotodiox Pro WonderPana Go Circular Polarizing (CPL) Filter - Filter f/ GoTough Filter Adapter System: Filter type: Circular Polarizing (CPL). Material: premium anodized aluminum ring with optic-grade organic glass. Size: 53mm female thread. Dimensions: ~2.2 x 2.2 x 0.2 in (5.5 x 5.5 x 0.6 cm). Weight: 0.4 oz. The 53mm thread matches the GoTough adapter system, and the lightweight build won't strain your housing or gimbal.
Fotodiox Pro WonderPana Go Circular Polarizing (CPL) Filter - Filter f/ GoTough Filter Adapter System - Fotodiox Pro WonderPana Go Circular Polarizing (CPL) Filter - Filter f/ GoTough Filter Adapter System: Compatible only with the WonderPana Go Filter Adapter System from Fotodiox Pro. Requires the correct adapter for your GoPro case model (H3 or H3+). You need the right adapter for your specific case to ensure a secure fit and proper optical alignment.
- Fotodiox Pro WonderPana Go Circular Polarizing (CPL) Filter - Filter f/ GoTough Filter Adapter System: Includes a plastic storage box with cushion liner. Limited 2-Year Manufacturer Warranty. The storage box protects the glass when not in use, and the warranty covers manufacturing defects.
Compatibility Notes and Limitations
This CPL filter works only with the GoTough WonderPana Go Filter Adapter System. It does not attach directly to a GoPro housing without the adapter. The filter is designed for the HERO3, HERO3+, and HERO4 models when paired with the correct adapter. It is not compatible with the HERO3+ Slim Case or later GoPro models unless you verify the adapter system supports them.
The supplied information does not confirm compatibility with underwater housings deeper than splash depth. If you plan to dive, test the seal with your housing before submerging the filter.
