wildlife photography

The crop factor of Canon's APS-C sensors is 1.6x. So a 300mm lens would look like 480mm on the 7D... giving it slightly more reach than the D7000.

Thanks for the feedback. Have been waiting for Canon to update the 7D and eliminate the noise factor. However, it doesn't look like that's happening anytime soon.

The statements about crop factor are not entirely accurate. The smaller sensor gives the impression of more reach simply because it's already cropped for you. The larger image gives you more of an image to crop as necessary. The arguable advantage of the smaller sensor is that it's more pixel dense, meaning that it shoves more pixels into the pre-selected cropped area than an equivalent field of view from the larger sensor, however this is also why crop sensor cameras are so much worse in low light and other high ISO conditions compared to full frame. The upside to this is that even if you take a rather severe crop of a 24 MP image, you still a lot of resolution; more than is necessary to fill a monitor and usually more than enough for prints, presuming they're not huge.