wasn't actually a big fan of filters, but it always had to be a POL filter. As an ignorant photographer, you get it drummed into you again and again: get a polarizing filter, you need it, because you can never get the effects of it in post-processing. So I started with cheap polarizing filters and quickly stopped. I currently have a pole filter from Rodenstock, with which I am actually very satisfied, apart from the fact that it is sometimes a bit bitchy when screwing it on and off. So far I only knew K&F in the cheaper filter line and was therefore looking forward to a comparison with my Rodenstock. The polarizing filter makes a great impression right out of the box and gave me a "wow" effect. The frame is made of brass metal and feels extremely good and high quality. The screw thread is manufactured with absolute precision and the filter itself has a strong, high-quality coating. What I then noticed when using it: how easily it can be screwed onto the lens and unscrewed again. In fact, I've never had that with any other filter. No snagging, no jerking, nothing. It doesn't degrade my photos in any way. No ghosting, no flares, no color cast. Absolutely great. All in all, I am extremely surprised by the high quality of this filter and will therefore continue to keep an eye on K&F when it comes to other filters. I am extremely satisfied and can therefore recommend it without hesitation, despite the higher price.