This double-sided magnetic lens filter mount adapter for the iPhone 17 Pro Max is a really great product. The key thing to note is that it allows the user to attach any 58 mm filter. This means filters for normal, mirrorless, or DSLR lenses that use standard filters. The filter included with this kit is a circular polarizer, which works well to cover all three lenses on the iPhone. It helps reduce reflections and makes the sky appear a deeper blue. The filter is made of aluminum, and while the turning is tight, it remains easy enough to rotate.Regarding the magnetic case, it fits the phone well, but it’s best used without a case covering the camera area. If there is a case in the camera area, this magnetic lens filter adapter may not fit properly because of its design. Overall, I think this works really well and is a great option, especially if you want to use standard filters on your iPhone. However, be aware of the type of case you have, as it could interfere with this adapter. The adapter is straightforward to put on because it is MagSafe compatible. And overall, I say this is a great value!