K&F Variable ND2-32 Filter for GoPro Hero 9-13 Nano-X Series | KF01.1870

Cinematic motion blur in the field, no filter swaps mid-shoot

The K&F Concept Variable ND2-32 Filter for GoPro Hero 9-13 Nano-X Series | KF01.1870 is built for action camera users who want cinematic motion blur without the workflow friction of swapping fixed-density filters mid-shoot. It covers the 1-5 stop range (ND2 through ND32) via a rotating dial, handling the light levels you encounter during typical outdoor activities from partly cloudy through full sun. The push-in fit with rotation lock installs in seconds without tools or adhesive, and the 7g weight adds negligible bulk to a helmet or chest mount. The 28-layer nanometre coating delivers 0.2% reflectivity and repels water, oil, and dust, critical for shooting in spray, rain, or dusty conditions where uncoated glass would fog or smear. The 5mm filter thickness avoids vignetting on the GoPro's ultra-wide field of view across 16:9, 4:3, and 8:7 sensor modes, so you can switch between standard video and vertical reels without cropping or corner darkening.

Variable density range for changing light
The ND2-32 range lets you dial in the exact shutter speed for motion blur as light conditions shift during a ski run or surf session. Action cameras default to fast shutter speeds to freeze motion, which produces sharp but clinical footage. A variable ND filter reduces incoming light so you can drop shutter speed and introduce motion blur, turning a static waterfall into silky flow or adding wheel-spin blur to a downhill mountain bike shot. The dial adjustment ring rotates through the ND range with tactile detents at each stop, allowing one-handed adjustment without removing the camera from its mount. You can fine-tune exposure mid-activity without stopping to dismount the camera or pull out your phone, adjusting ND strength while riding a chairlift between runs as the sun breaks through clouds.

GoPro Hero 9-13 Black compatibility
The push-in fit with rotation lock is designed specifically for the Hero 9, 10, 11, 12, and 13 Black lens housing geometry. It installs in seconds without tools or adhesive, so you're not fumbling with thread adapters on a cliffside or boat deck. The filter attaches directly to the bare lens housing and cannot mount over GoPro's waterproof housing or dive case. For surface water sports like surfing or kayaking where the camera is exposed to spray but not submerged, the waterproof coating handles moisture without the housing.

Optical quality and coating durability
The filter uses imported AGC optical glass with uniform density across the entire surface to prevent colour shifts or hotspots as the ND strength changes. It delivers neutral colour rendition from ND2 through ND32 without the green or magenta cast that cheaper variable NDs introduce at higher stops, so you're not fighting colour correction in post when grading footage from a full day of skiing where you've rotated through the entire ND range as cloud cover changed. The 28-layer nanometre coating reduces surface reflectivity to 0.2% and repels water, oil, dust, and fingerprints through molecular-level hydrophobic treatment. It maintains contrast and colour accuracy in spray, rain, or dusty conditions where uncoated glass would fog or smear, shooting whitewater kayaking or coastal surf where salt spray hits the lens every few seconds.

Scratch resistance for field use
The hardened surface treatment resists abrasion from sand, rock dust, and pack fabric during transport and field use. It maintains optical clarity through seasons of backcountry use where uncoated glass would accumulate micro-scratches that degrade image sharpness. You can toss the camera into a backpack side pocket on a trail run without worrying about grit damaging the filter. The included storage case is a rigid protective case with foam insert that prevents impact damage and keeps the filter clean when not mounted, protecting it during travel and between activities so it's ready to use without cleaning every time you pull it out. The microfibre cleaning cloth gives you a safe cleaning method in the field without risking coating damage from shirt fabric or paper towels.

No vignetting across sensor modes
The 5mm filter thickness keeps the optical stack thin enough to avoid vignetting on the GoPro's ultra-wide 155° field of view. The optical geometry and frame profile are engineered to stay outside the GoPro's sensor field of view at all focal lengths and aspect ratios, so the filter works across 16:9, 4:3, and 8:7 sensor modes without cropping or corner darkening. You can switch between standard video and vertical reels on the same ride without swapping filters or accepting frame loss, filming POV footage on a helmet mount where any vignetting would ruin the immersive wide-angle effect.

Lightweight aluminium construction
The aluminium alloy frame keeps the filter lighter than most lens caps while maintaining structural rigidity. It adds negligible weight to a helmet or chest mount, so you don't notice it during high-movement activities like wearing a helmet mount through a full day of rock climbing without neck fatigue from front-heavy gear. The aluminium construction survives drops and impacts that would crack plastic frames, so the filter lasts through multiple seasons of hard use, bouncing the camera off rocks during a trail running fall without destroying the filter.

The K&F Variable ND2-32 Filter for GoPro Hero 9-13 Black | KF01.1870 is built for adventure filmmakers and content creators who need cinematic motion blur in bright conditions without the workflow friction of swapping fixed-density filters. With imported AGC optical glass, 28-layer nanometre coatings, and a 7g aluminium frame, it's a durable, field-ready tool that handles the light levels you encounter during typical outdoor activities. Order the KF01.1870 today and bring motion blur to your action footage with confidence.

Technical Specifications:
 - Filter Type: Variable ND (ND2-32)
 - Stop Range: 1-5 stops
 - Glass Material: Imported AGC optical glass
 - Coating: 28 multi-layer nanometre coatings (0.2% reflectivity)
 - Coating Properties: Waterproof, scratch-resistant, dustproof, oil-proof
 - Frame Material: Aluminium alloy
 - Filter Thickness: 5mm
 - Weight: 7g
 - Installation: Push-in fit with rotation lock
 - Adjustment Method: Dial ring for variable density control