Camera lens filter K&F Concept Filter Slim 49 mm KV34 - 49mm slim screw-on optic filter

The K&F Concept Filter Slim 49 mm KV34 is a slim screw-on neutral density (ND) filter for lenses with a 49 mm thread. It reduces incoming light from ND2 to ND400, enabling longer exposures in bright conditions while maintaining compact size and low weight for travel and everyday use.

Advantages

The KV34 filter is made from optical glass with a double-sided, multi-layer blue coating that improves image quality and provides water resistance. Its 7.3 mm low-profile frame and super-light CNC metal ring minimise vignetting on wide-angle lenses and have minimal impact on balance when used on a tripod. The variable density range from ND2 to ND400 offers flexibility for different lighting situations and creative long-exposure effects.

Suitable for

• Landscape photography requiring long exposures
• Capturing motion blur in water, clouds or traffic
• Reducing exposure in bright sunlight without changing aperture or ISO
• Travel and everyday photography where a compact, lightweight filter is needed

Key specifications

• Manufacturer: K&F Concept
• Model / MPN: KF01.1398
• Filter type: Variable neutral density (ND) ND2–ND400
• Glass: Optical glass with double-sided multi-layer blue coating
• Mount size: 49 mm screw-on
• Frame thickness: 7.3 mm (slim profile)

How to use

Screw the filter onto the front of a lens with a 49 mm filter thread until it is secure but not over-tightened. Adjust the filter to the desired ND value between ND2 and ND400 to achieve the required exposure reduction. Because the filter enables longer shutter speeds, use a tripod when necessary to avoid camera shake. Check framing and exposure in the viewfinder or on the camera monitor, and compensate with shutter speed, aperture or ISO as needed.

Usage recommendations

Use the KV34 filter when you need extended exposures in bright light or want to create motion blur effects. Combine with a sturdy tripod and remote shutter release for the sharpest results; clean the coated glass with appropriate lens-cleaning tools to maintain image quality.