The package of filters and step-up rings arrived too late in the day for any serious evaluation, so I got silly. The 3 filters (a circular polarizer and 2 NDs) are 62mm for my O12-40. Step-up rings are inexpensive but Cir-PL filters are not. To use the Cir-PL on other lenses I bought a 58-62mm for the O40-150 and a 52-58mm for the P14-45. Tomorrow I'll start testing to see how wide I can go on each 3 lenses with various filter combos. But today was play time. Behold, the vignetting of 2 step-up rings plus 3 filters on the O9-18: Useless, as expected.