The K&F Concept B-Series filter has a very high-quality feel – the glass is clear and robust, the aluminum frame is pleasantly light yet sturdy. I find the handling particularly practical: the grip opening makes the filter very secure in the hand and allows it to be quickly positioned in front of the lens or attached to a tripod.

The creative effects are truly something special. The "swirl" design creates a beautiful, atmospheric blur around the subject, instantly giving photos and videos a cinematic look. Especially with portraits, this creates a unique look that's hard to achieve with traditional filters. For creative projects or when I want to add more atmosphere to my shots, this filter is simply perfect.

The build quality is also impressive: no color shifts, no distracting reflections, the glass is easy to clean, and it can be safely transported in the included carrying case. You can immediately tell that the needs of photographers and videographers were considered in this design.

All in all, a creative tool that's fun to use, inspiring, and takes my work to a new level. I like to use it whenever I want to create something special.