Ok, I am about to drop a nice bit of money on a polarizer for my ZD 150mm ƒ2.0. It is 82mm, so the lenses I use it on will be limited. There are two reasons I want to get one. 1. To allow a faster aperture at the airshow when trying to blur propellers. Last year I was well into diffraction when at 1/250 or lower shutter speed. The polarizer will block some light and help with reflections off of the planes. 2. To help with the blue or green colored reflections I will sometimes get off of gators when I photograph them. So, anyone using both or either on an EM1? Looking for any advantages and disadvantages people can come up with when deciding which to get. This will be used with PDAF only and either in S-AF or C-AF, if that makes any performance differences. Any and all advice is welcomed.