I saw this very interesting thread on the avs forums. http://www.avsforum.com/avs-vb/showthread.php?s=&threadid=279972 Here's a key part: " applied two 67mm filters to my PT-L300U -- a Neutral Density Filter +2 from wolf/ritz camera (you can buy it online) and a (this is a little hard to find) Kodak CC05M filter. These two filters do the following: the CC05M filter is like the FL-D filter so so often used in that it blocks some of the green and lowers the black level a small amount. When you add the Neutral Density +2 filter, which is light gray, it cuts light output and increases contrast somewhat. The result is a dramatic improvement in black levels" Based on the advice from folks in this forum I have added a Hoya HMC FLD filter to my AE100 and think its a good improvement. But I still find the picture to be a bit bright actually. So if the CC05M is like the FLD (which I have put on) - does anyone know a filter this is 'neutral density + 2' from http://www.2filter.com/prices/catalog.html I used them for the FLD filter - top service. Going by the thread on avs - the combination of the two gives the best results. I'd like to reduce the overall brightness a bit more (there's a lot of light from the screen on the walls etc). I think a more dark image will improve things for me.