#4. "RE: Nikon D7000 powered external mic output" In response to In response to 3
I received the Audio Technica Pro 24-CM microphone and my new Nikon D7000 camera (Yea!). Tried the mic initially with an LR44 battery installed in the mic, and it worked properly. I've now mounted the mic, removed the battery from the mic itself and used the camera's mic jack. Again, the mic works well with its power derived from the camera itself.
Just from an initial, admittedly limited observation, I think the quality of the sound recorded with the mic using the camera's mic jack for power is somewhat better than when the LR44 battery was used to power the mic.