Customers most agreed on the following attributes:
I've used Hoya filters for many years. I was pleasantly surprised when I found that the lens cap for my Olympus 12-60SWD fit into the thin filter perfectly.
I noted both the strong mount and loose mount because initially it did not seem to want to thread and seat itself properly, but once set, seems to be very sturdy. Otherwise, it's working as good insurance for my lens.
it's clear and much better than Hoya HMC or SMC. The thread design is not that good as B+W. For the price, I would still highly recommend