…because I needed it! 
This filter (which I only discovered this week) is a lifesaver for me.
Even with the curtains pulled back to let in daylight, three desklamps, one floorlamp and improvised aluminum-foil reflectors, my limited-budget home studio has barely adequate light for my Panasonic 3-CCD videocams. (Manual Iris: Open +12dB)
…and clean it up, this filter does.
I tried the filter in an attempt to get rid of jittering pixels on the wall behind me in talking-head videos, where the cameras cannot decide quite what color it is; it does that very well.
The unexpected bonus is what it does for skin tones. Where previously I would struggle for hours to get skin tones that both matched from all three cameras (different angles, different zoom, meant different light hence different tones.) and were healthy lifelike tones, with the wavelet filter first, adjusting White Balance, Brightness and Contrast is a breeze, and the resulting skin tone exceeds anything I have previously achieved. Golden and awesome.
