a lot of talk about the lack of DR, and the low pixel density, and if this is really an upgrade over 5d2. I have shot with the 5d2 for over 3 years, and with a 7d for birding, for about 6 months. I have always found the 7d to focus very well against a blue sky, simple background, but put any other background, and it looses its focus easily. Here is a sequence which was not possible even with my 7d. the hawk was gathering twigs to help the nest (the couple already has a nest with eggs in it). Locked on him, and followed him over water, rocks, and gravel, etc. the sequence has about 30 shots. Only one is grossly out of focus, one is soft. of the remaining 28, I would say about 3/4 are in perfect focus, and the remainder show a little bit of blur (not sure if its focus or my panning)
Oh yeah, and forgot to mention, this is done with the 100-400, on a kenko 1.4x at 400mm. My 7d could not do this with the bare lens. all shots are well over 50% cropped
and a link to the original collage.
http://www.flickr.com …2/sizes/o/in/photostream/
Here is one of the single shots
