Is a polarizing filter the same as a polarizing filter? No, that is not so. Polarizing filters polarize to a greater or lesser extent. That shows you the price you pay for it. But there are other things too: A really good filter does not have a light metal frame, because this could twist under pressure when screwing in and the filter could seize up. This polarizing filter has a heavy and precisely made brass mount, the rotary ring to bring the polarizing filter into the right position runs smoothly and smoothly. Additional corrugations on the socket prevent fingers from slipping when turning. This is also bitterly necessary, because the filter is designed as a "slim version" with a very short overall width in order to also be suitable for wide angles. The filter's coating looks impressive and I'm happy to believe that it's particularly effective at preventing reflections (although this could only really be proven in a comparative test). The polarization effect is very good and there is no color deviation in Lightroom. I have never owned a photographic filter that was so elaborately packaged - yes, almost "staged" - like this professional filter from the Chinese manufacturer Shenzen Zhuo Er. With this, the manufacturer wants to underscore its claim of being at the forefront of the market segment. I take it for granted that he can do that. In terms of manufacturing quality, the filter easily reaches every Heliopan or Rodenstock filter. Of course, it also costs accordingly. I'll be happy to buy a few more filters of this type - I've got a taste for them now. Do you automatically make better pictures by using such an expensive filter? Definitely not. If you were previously satisfied with your image results, this filter will not open up a "completely new world" to you. But if you're eager for every technical possibility to improve quality, then, yes, you should really consider switching to these fantastic filters.