The KF-Concept ND 1000 filter is delivered in high-quality packaging. The filter is also located in a sleeve made of felt/imitation leather with a magnetic closure cap. A microfiber cloth is also included for cleaning the filter. The filter itself is a round filter made of tempered glass in the "slim" version. It is particularly compact and thin, which is particularly useful with compact lenses. The filter works excellently. There are no color fringes, air pockets, color casts or discolorations visible. Even with images, the filter is absolutely uniform. The filter thread is milled from aluminum and clean. The filter can be easily screwed onto the lens. Conclusion At the time of my purchase, this ND 1000 filter cost EUR 159.00. High-quality glass filters in this quality class are usually significantly more expensive. So I think the price/performance ratio is very, very good. It's not for nothing that KF-Concept named this filter line Flagship - the filter is worth every cent and really is an excellent addition to my existing screw-on filters. So I'm giving it 5 stars and I hope my review was helpful