Quick question: I added a prism to my TLR a while back, and while it's easier to focus quickly than with the WLF, it seems to be significantly dimmer. Is this due to the magnification, or is there something in that prism that should be checked out? I realize that a f3.5 lens on a cloudy day isn't the brightest, but the difference is pretty noticable. I suppose the other question is whether there's any solution to safely removing haze from the ground-glass (or fresneled plastic?) on a C220. Thanks for your time.