I recently bought a used 7D from a photographer who was upgrading to the Mk2 version. I find that the noise performance of the camera is poor particularly when compared to my workhorse camera, a 5D2. I've read that the topic was much discussed when the camera was launched but I would be interested to hear the views of any forum member on the 'practical' experience with the camera. I invariably shoot in RAW and examining photos in Lightroom shot at ISO 400 I can detect a fair amount of luminance noise. (I did try and post a couple of shots but the small file sizes preclude a good comparison.) Any thoughts would be appreciated. Thanks.