K&F Concept Variable ND Filter ND3-ND1000 37mm - Adjustable Neutral Density Lens Filter

The K&F Concept Variable Neutral Density Filter (ND3-ND1000) is a high-quality adjustable filter designed for photographers seeking creative control over exposure. With a 37mm thread, it fits compact cameras and lenses, allowing smooth transitions from 1.5 to 10 stops of light reduction. Crafted from Japanese AGC optical glass and aviation aluminum alloy, it features a 28-layer nano coating for waterproof, oil-proof, scratch-resistant, and anti-reflection performance. The ultra-slim frame prevents vignetting, while the innovative design eliminates the 'X' cross pattern at maximum density. Ideal for long exposures, motion blur, and shallow depth of field in bright conditions.

Advantages

This variable ND filter offers unparalleled versatility, replacing multiple fixed ND filters. Its precise rotation mechanism enables quick adjustments without removing the filter, saving time in dynamic shooting environments. The multi-layer coating ensures minimal color shift and maintains true color balance, while the double-sided polishing delivers high-definition image quality. The robust aviation aluminum frame is lightweight yet durable, making it an essential tool for both amateur and professional photographers.

Suitable for

• Landscape photography requiring long exposures for silky water or cloud motion
• Portrait photography in bright sunlight to achieve shallow depth of field
• Video recording to maintain shutter speed and cinematic motion blur
• Architectural and cityscape shots with moving elements like traffic or crowds

Key specifications

• Filter Type: Variable Neutral Density (VND)
• ND Range: ND3 to ND1000 (1.5-10 stops)
• Filter Diameter: 37mm
• Optical Material: Japanese AGC Optical Glass
• Frame Material: Aviation Aluminum Alloy
• Coating: 28-Layer Nano Coating (waterproof, oil-proof, scratch-resistant, anti-reflection)
• Special Feature: Eliminates 'X' cross pattern at maximum density
• Frame Design: Ultra-slim to prevent vignetting
• Color Fidelity: Minimal color shift, true color balance

Recommendations

For best results, use with a lens hood to minimize flare. When using at maximum density (ND1000), ensure proper focus before attaching the filter, as the viewfinder may darken. Compatible with lenses featuring a 37mm filter thread.