Tomorrow I think I'm going to go out with just my 400D and 50mm f/1.8 and I'm wondering if I should keep a polariser on or nothing. I'm going to be shooting street so I may need the extra light but you never know when getting rid of reflections may come in handy. Or I could just go nothing to get the light but no protection. The reason I'm not using my UV filter is because it produces too much "green flare" when I shoot into the light. I don't know if this is due to it being dirty or just because it's a UV filter but I'm going to give it a rest tomorrow. So would you leave a polariser on if you're going to be shooting during the day just to see the effects? Or would you rather just have nothing?