I tested the K&F Concept 58mm kit to eliminate obnoxious reflections when shooting with the iPhone 15 Pro Max. This polarizing filter (CPL) works by filtering light reflected from shiny surfaces such as glass, mirrors and bodies of water, making shots sharper with saturated colors and increasing contrast. The magnetic pressure clip is attached with a simple push: just insert the lens into the holder and that's it, without complicated mechanisms or fragile attachments. Feather weight of 19.3 grams, almost like a coin. The inner silicone ring adheres perfectly to the back of the phone, preventing slipping when rotating the filter to find the best angle. The zip case and red cord keep everything organized in the bag without cluttering up. In 30 days of intense use I have photographed landscapes, outdoor portraits and shop windows: the filter really eliminates the annoying reflections that ruin the composition and amplifies the details of the sky and water. The optical glass keeps the shadows intact without bleaching the image. Only consideration: the mount is universal at 58mm, so check compatibility before buying. The case and the lanyard are also nice and comfortable.