Checking in from Berlin. German keyboard, in case of typos below. Careful, Boris. I have seen three types of Pentax filters for 35 mm:
1. Recent ones, mainly SMC, except I believe the polarizers may not be. High quality. 2. Older ones, well-made but not SMC. I have many of these. They are high quality, just not SMC. 3. Pentax at some time marketed some really lousy filters that had Pentax's name on them, but were clearly made by someone else. I bought a couple of skylights off eBay from Henry's like this. They had little skylight coloring and would not even screw on properly. Be sure what you are buying. Unscrupulous sellers will advertise a filter as Pentax when it will merely fit on a Pentax lens. Joe
