K&F CONCEPT 55MM, True Color Variable ND2~ND400, ultra-thin adjustable filter, optical glass

The K&F Concept 55mm True Color Variable ND2–ND400 Filter is an ultra-thin, high-precision adjustable neutral density filter designed to reduce incoming light without altering color accuracy. Built with premium optical glass and a multi-resistant coating, it offers smooth exposure control for long-exposure photography, wide-aperture shooting, and creative motion effects.

The K&F Concept 55mm True Color Variable ND2–ND400 Filter provides flexible and precise control over the amount of light entering your camera lens, making it an essential tool for photographers and videographers. As a neutral density (ND) filter, it reduces light without introducing color shifts, maintaining true-to-life tones and consistent image quality. With an adjustable ND range from ND2 to ND400, this variable filter allows smooth, step-free exposure control equivalent to approximately 1–8+ stops of light reduction. This makes it ideal for long-exposure photography, motion blur effects, and achieving shallow depth of field in bright lighting conditions. The ultra-thin frame minimizes vignetting on wide-angle lenses, while premium optical glass ensures clarity, sharpness, and durability. It also incorporates an anti-reflection and scratch-resistant coating for maximum performance even in challenging environments. A variable ND filter cannot be replicated in post-processing, making this tool essential for achieving correct exposure and maintaining creative control in real time.

Key Features:

• True Color Variable ND2–ND400 for smooth, adjustable light reduction
• Ultra-thin frame design to reduce vignetting
• High-quality optical glass for superior clarity
• Multi-layer coating for anti-reflection and scratch resistance
• Enables long-exposure effects and wide-aperture shooting in bright light
• Maintains neutral color rendering without distortion
• Works similarly to a polarizing filter by adjusting front element rotation