So, the 40mm lens has a gigantic 95mm filter thread. Anybody have suggestions about Lee, Cokin, or other filter systems that I could use for this? I really don't want to buy 95mm filters for a lens that I don't actually own. All I need is a couple black-and-white filters, medium yellow and red would be enough. And maybe a 2-stop ND filter... it would be nice to get a filter holder setup, so I could use it on my other gear (I have lenses with filter sizes from 40.5mm up to 67mm).