K&F 4-in-1 Filter Set for GoPro Hero 4K — Neutral Density ND4 ND8 ND16 and Polarizer PL, Gray

The K&F 4-in-1 gray filter set for GoPro Hero 4K includes three neutral density filters (ND4, ND8, ND16) and a circular polarizer (PL). Designed to attach to compatible GoPro housings or filter mounts, this compact set reduces incoming light and manages reflections to help achieve controlled exposure and improved color rendering in bright outdoor conditions. The ND filters lower light intensity to enable slower shutter speeds for natural motion blur and reduced overexposure, while the PL filter suppresses surface reflections and enhances contrast and saturation for clearer action footage.

Advantages

The set combines multiple optical functions in a single, lightweight kit suitable for action cameras, minimizing the need to swap separate filters during activity. Neutral density filters provide graduated light reduction for different brightness levels, allowing more precise shutter-speed control. The polarizer reduces glare on water, snow and other reflective surfaces and can increase color depth without altering white balance. Constructed to fit common GoPro filter mounts, the filters are low-profile and designed for easy installation and secure fit during fast movement.

Suitable for

• Action sports filming — surfing, skiing, mountain biking
• Bright daylight outdoor videography and time-lapse sequences
• Water and snow environments where reflections are common
• Scenes requiring controlled motion blur and reduced overexposure

Key specifications

• Filter types: Neutral Density (ND4, ND8, ND16) and Polarizer (PL)
• Purpose: Light reduction (ND) and reflection suppression/color enhancement (PL)
• Compatibility: Designed for GoPro Hero 4K with compatible filter mount or housing
• Form factor: Compact, low-profile round filters suitable for action camera lenses

How to use

Select the ND filter that matches current light conditions: ND4 for mild reduction, ND8 for moderate brightness, and ND16 for very bright environments. Attach the chosen filter or the polarizer to the camera's filter mount before recording. When using the polarizer, rotate it while monitoring the image to find the position that best reduces reflections and increases saturation. For motion blur effects, set the camera to manual shutter or use a shutter-smoothing setting if available, and adjust exposure accordingly after fitting the ND filter.

Usage recommendations

Inspect and clean filter optics before use to avoid spots or flare. Store filters in a protective case when not in use and avoid overtightening mounts to prevent damage. When shooting fast-moving subjects, verify secure attachment and periodically check the filter during extended sessions.