l needed a 58mm slim polarizer for one of my Canon mirrorless lenses. Someone at DP Review posted this link. l got one for $38 instant savings making it $5usd. Took a few test shots with and without it tonight and did not notice degraded image quality with it on. l'm sure they're not multicoated, but in high flare situations l generally don't use a polarizer anyway. 62m is the largest size Adorama has. Too bad you can't get larger sizes because most DSLR lenses are 67mm or larger.