Hey Guys, For what it's worth, the way I check for stray reflections in a filter that I may plan on using is to look down at the filter as I hold it and if I see nearly no, or no reflection of my ugly mug, then I know that this filter will not contribute to unwanted reflections or image degradation. Of course I only use either Nikon, Minolta or B&W (Pro Series, Multicoated), filters. When using Nikon or Minolta filters, I stick to the Multicoated ones such as L37C, or L1BC. Polarizing filters are another matter. I don't know if anyone makes a Multicoated Circular or Linear Polarizer, because I've been looking for one for years. Art Tafil