Lee Filters BS10100U2 100x100mm Neutral Density 3.0 Filter (10 Stops)

Landscape photographers chasing silky waterfalls and streaking clouds will find the Lee Filters BS10100U2 an indispensable tool. This 100x100mm square neutral density filter cuts light by 10 stops, allowing shutter speeds to stretch into seconds or even minutes in broad daylight. Slip it into a Lee 100mm holder, and watch moving water turn to mist while static rocks stay razor sharp.

Key specifications

• Type: Neutral density (ND) filter
• Density: 3.0 (10 stops of light reduction)
• Filter factor: 1000x (light transmission 0.1%)
• Dimensions: 100 x 100 mm (4 x 4")
• Material: High-quality optical glass
• Thickness: 2 mm
• Compatibility: Lee 100mm filter holder system
• Coating: Uncoated
• Included accessories: Protective tin case

Why choose it

This ND filter delivers a powerful 10-stop reduction with minimal colour cast, preserving natural tones in long exposures. Its optical glass construction ensures sharpness across the frame, while the slim 2mm profile prevents vignetting even with wide-angle lenses. The square format allows precise positioning and stacking with other filters in the Lee system.

Ideal use cases

• Blurring waterfalls, rivers, and ocean waves
• Creating ethereal cloud movement in landscapes
• Removing people or vehicles from busy scenes
• Architectural photography to smooth out transient details
• Fine art projects requiring extreme long exposures

Good to know

The filter comes in a protective tin case for safe storage and transport. A slight cool cast may be present, easily corrected in post-processing or with white balance adjustment. No coating is applied, so handle with care to avoid scratches. For best results, use a sturdy tripod and remote shutter release.