K&F CONCEPT has become my favorite brand of lens filters, and this one is a bit more specialized than most because it’s designed as a creative filter rather than a purely technical one.

The Gold Diffusion (1/4) effect produces a subtle warm glow around highlights and point light sources, giving images a pleasing golden tone and slightly softened look. It’s especially flattering for portraits, where it gently smooths skin texture and reduces the appearance of minor blemishes while maintaining good overall detail.

I also like using filters like this in-camera rather than relying entirely on post-processing. Capturing the look directly while shooting often produces a more natural and organic result.

As expected from K&F CONCEPT, the build quality is excellent, with a solid filter ring and high-quality coatings that help preserve image clarity while adding the desired creative effect.

Overall, this is a very nice creative filter that adds warmth and softness in a tasteful way. A great option for portraits, cinematic video work, or any situation where you want a softer, more atmospheric look straight out of the camera.