I just did a test with my 5D MkII and the Sennheiser MKE 300 Mic and it sounded great!

The results were loud and clear with good low end and good highs, with no noise or distortion.

I plugged the MKE 300 directly into the 5D MkII with a 1/8 mono to stereo adapter.

Has anyone else used the Sennheiser MKE 300 with a 5D Mk II ??

if so, what were your results??

Decent results, but I'd spring for the MKE400 if I was buying new. I've had both, the 400 is much slimmer and sounds better. Better build in shock too.