Neutral Density Variable Filter K&F Model SB7472, 46 mm, ND3–ND1000

The Neutral Density Variable Filter K&F Model SB7472 with 46 mm thread is a variable ND filter that provides adjustable light reduction in the range from approximately ND3 to ND1000. It is designed to fit lenses and adapters with a 46 mm filter thread and allows photographers and videographers to control exposure time, motion blur and depth of field under bright lighting conditions without changing lens aperture or ISO.

Advantages

This K&F variable neutral density filter delivers a continuous range of light attenuation so you can fine-tune exposure without swapping multiple fixed ND filters. Its compact 46 mm size preserves lens balance and keeps the front element protected while allowing longer shutter speeds for smooth motion blur or reduced depth of field in bright light. The variable control supports precise adjustments for both stills and video work, reducing the need for frequent exposure compensation.

Suitable for

• Landscape photography requiring long exposures to smooth water and capture cloud movement
• Long-exposure urban and architectural photography in daylight
• Video production to maintain cinematic shutter angles and consistent exposure in bright scenes
• Portrait and shallow-depth-of-field work when shooting in strong ambient light

Key specifications

• Filter type: Variable neutral density
• Filter thread diameter: 46 mm
• Light reduction range: from approx. ND3 to ND1000 (variable adjustment)
• Compatibility: lenses and adapters with 46 mm filter thread
• Primary use: exposure control, motion blur creation, depth-of-field management

How to use

Screw the filter onto the front of a lens with a 46 mm thread until it is secure but not overtightened. Rotate the outer ring to change the density level and observe the exposure through the viewfinder or on the camera monitor; adjust shutter speed, aperture or ISO as needed for the desired effect. For long exposures use a tripod to avoid camera shake. When using the filter for video, check for any change in color balance or vignetting at extreme settings and adjust white balance or framing accordingly.

Usage recommendations

To minimize potential cross-polarization or uneven darkening at extreme settings, avoid stacking other filters directly on top of the variable ND. Use a lens hood and keep the filter surface clean to maintain image quality. For critical color fidelity and the maximum uniformity across the frame, test the filter at the intended density levels before important shoots.