I'm quickly finding the limits of the Sennheiser MKE400. Hissy and you still have to crank the gain on the camera pretty well to get a usable signal. I happened upon the Shure VP83F on the internet the other day and was initially wooed by its inclusion of a built in wav recorder. I was really jazzed to see when I started using the demo that Shure has lent me that even at the mic's baseline input level, I had to crank the gain down to the lowest setting on my camera. Set up there I got a super clean, fat sound. Plus, you can be rolling audio the whole time, even between shooting video clips. I like it a whole, whole lot. Want to buy a Sennheiser?
Ha, not that MKE400, it's junk as you well now know. A good base mic for those starting out however as an introduction to sound.