Clip-on variable ND filter lens K&F Model SB8863 for smartphone (ND2–ND32, fader)

The K&F Clip-on variable ND filter lens SB8863 for smartphone is a neutral density accessory that attaches directly to a phone camera using a clip system. It provides adjustable light reduction between ND2 and ND32 via a fader control, allowing users to reduce incoming light smoothly without changing the camera’s exposure settings. The filter is intended to help achieve slower shutter speeds, motion blur effects, and wider aperture look in bright outdoor conditions while maintaining color neutrality.

Advantages

The fader-based variable ND design delivers continuous control over light attenuation from ND2 to ND32, enabling fine-tuning of exposure for both photo and video. The clip-on mechanism offers quick attachment and removal across most smartphone models without the need for a dedicated case or mount. Optical coatings and neutral transmission maintain accurate color rendition and image contrast when reducing light. Compact and portable construction makes the filter convenient for on-the-go mobile photography and videography.

Suitable for

• Landscape photography with slow shutter effects
• Mobile video capture requiring controlled exposure and motion blur
• Portraits in bright light to simulate shallower depth of field
• Long-exposure creative shots using a smartphone
• Outdoor time-lapse and panning shots

Key specifications

• Variable ND range: ND2 to ND32 (approx. 1 to 5 stops of light reduction)
• Adjustment mechanism: fader slider for continuous density control
• Mount type: universal clip-on compatible with most smartphone cameras
• Optical properties: neutral density filter with multi-coated surfaces for reduced reflections
• Form factor: slim circular filter element integrated into a compact clip housing

How to use

Attach the clip-on filter so the optical element covers the smartphone camera lens, ensuring alignment to avoid vignetting. Use the fader control to set the desired level of light reduction between ND2 and ND32; rotate or slide as required by the product’s mechanism. When composing an image or video, adjust shutter speed and aperture (if available) to achieve the intended motion blur or depth-of-field effect while observing the metering readout or histogram to avoid underexposure. Remove the clip when not needed to restore normal exposure and autofocus performance.

Usage recommendations

For best results, test densities in similar lighting before critical shoots and start with lower ND values to evaluate exposure changes. Secure the clip firmly to avoid slight movement during long exposures and clean the filter element with a microfiber cloth to prevent artifacts. When using autofocus or face-detection features, recompose after attaching the filter if the phone mis-registers focus. Avoid stacking additional filters or accessories that may cause vignetting with wide-angle smartphone lenses.