I am not sure that this is where I should post this question but it seemed like the best fit.
I had questions about which brands of polarizer and filters people are finding to be the most durable in the field.
When I needed new polarizers and filters some years ago I did the usual research/reviews etc. and chose a particular brand as they had very good reviews and a reasonable price. Of course, all reviews are based on new equipment - not after a few years of use.
I do a lot of backpacking/hiking, so my gear gets "exposed". I do my best to take care of it, but my polarizers especially (used more than filters) are not standing the "test of time". I am guessing that what I am seeing is some micro delaminating of the polarizing coating- but that's just a guess.
So - of those out there who also put their gear to the test in the wilds, which brands/models really do hold up and which to avoid?
I've never seen a Marumi c-pol de-laminate. Even the best quality c-pol filters can be damaged by high heat and liquid cleaners seeping between the glass sandwich layers. Never spray cleaning solution onto a c-pol. Moisten a tissue and then wipe the glass. Don't keep anything in your car when you're not in it. If it's too hot for you, its too hot for your gear.
Western Montana, one of the most beautiful regions I know of anywhere.
Back to topic, I use Kase magnetics filters and lens caps and take them everywhere. They aren't inexpensive but they are durable and don't get lost being magnetic. I have a polarizer, ND, and black mist stacked together with a spare lens cap on top of the stack and "back cap" on the bottom. This give me a nice .75" tall stack of three filters that is protected on both ends and slips into the upper zippered pockets in my hiking pants. No need for a carrying case and I can separate and install the magnetics with light gloves on. I really like the filters but just the magnetic cap is great to have. I was buying replacement lens caps every few months prior to switching over. I'm happy to post a photo if interested.
I think I had the same problem many years ago. The delamination was always near the filter's edge. I replaced the offending filters with the B+W Kasemann model. The ones labelled Kasemann are sealed around the edge while those without that designation (and I assume nearly all other brands) are not. I used those filters for about 20 years, until about 1.5 years ago when I changed camera systems and none of the filter diameters were the same. I still have them and they are still in perfect condition with no signs of delamination.
