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This K&F Concept 39mm Variable ND Lens Filter is for photographers and videographers seeking creative control over light in bright conditions. Its primary benefit is the adjustable neutral density, allowing for motion blur effects like silky waterfalls or smooth clouds even in harsh sunlight. A key consideration is ensuring your lens has a 39mm thread size, as compatibility is specific. This filter provides adjustable light reduction from ND2 to ND400 (1-9 stops) using high-quality Japanese optical glass with an 18-layer multi-coating for clarity and protection.
| Brand | K&F CONCEPT |
|---|
ND stands for Neutral Density. An ND filter reduces the amount of light entering the camera lens without affecting the color balance. This allows for creative control over exposure, such as using slower shutter speeds or wider apertures in bright light.
You need to check the filter thread size on your lens. Look for a series of numbers on the lens cap or barrel, often marked with a circle symbol (e.g., ø39mm). This filter is specifically for lenses with a 39mm thread.
This variable ND filter offers an adjustable range from ND2 (1 stop of light reduction) up to ND400 (approximately 9 stops of light reduction).
Yes, the filter features an ultra-slim frame designed to minimize vignetting, making it suitable for use with most wide-angle lenses. However, extreme wide-angle lenses may still exhibit some corner darkening at certain focal lengths.
Use a soft lens brush or a clean microfiber cloth to gently remove dust. For smudges, lightly dampen the cloth with a dedicated lens cleaning solution and wipe carefully. Avoid abrasive materials.
The 18-layer multi-coating enhances light transmission, reduces unwanted reflections and glare, and provides waterproofing and dustproofing, contributing to the filter's durability and the clarity of your images.
While designed to be neutral, variable ND filters can sometimes exhibit a slight color cast, particularly at their highest ND settings. This is generally minor and can be corrected in post-processing.
This is a common artifact with variable ND filters. Try adjusting the outer ring to a slightly lower ND setting or rotating the filter slightly on the lens. Ensure the filter is not over-tightened.
Some color shift can occur at extreme ND levels. This can usually be corrected in post-processing software. Ensure the filter's coatings are clean.
Check that you are using the correct 39mm filter and that both the lens threads and filter threads are clean and undamaged. Do not force the filter; it should screw on smoothly.
While the frame is ultra-slim, very wide-angle lenses might still show some vignetting at certain focal lengths. Try adjusting your focal length slightly or use a lower ND setting if possible. Ensure the filter is seated correctly.
Compatibility: This filter is designed specifically for camera lenses with a 39mm front filter thread. Always verify your lens's thread size before purchasing. It is compatible with K&F CONCEPT and other brands of lenses featuring this specific thread size.
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