- the AF is superior to the 5d2, more focus points, better servo mode than the 5d mkii

- it has pop-up flash (comes in handy once in a great while for fill or to trigger strobes) will mount EF-S lenses (I only own one, the rest in my kit are EF mount because I have been planning on going full frame for a while now).

- it has wireless flash controls built in, if you own other Canon speedlights (I don’t have any yet – only Alien Bees B800′s)

- dual digic 4 processors (5d2 only has one)

- shoots video same as the 5d2

- very low noise up to iso 800, where the 5d2 then takes over

- a few more bells and whistles that the 5d2 doesn’t have like on-screen leveling

All of that is fine and dandy, but when it comes down to pixel peeping, I’ve been seeing a lot of softness from the 7D in the samples online.  Not just studio stuff – real world conditions.

This review scares me a little. http://darwinwiggett.wordpress.com/2009/11/11/the-canon-7d/
I think we have to wait until Adobe updates ACR and Lightroom more the handle the Raw conversion a bit better, in order to come to the proper conclusions. Right now the 7D is looking softer than everything, at 100% native resolution. Sure, you can sharpen, but if there’s a little ISO 200 or 400 noise that low noise camera suddenly turns into worse noise than ISO 1600.

The 7D also out-resolves the glass you mount to it, much more than a 5d2.  That means softer images, seeing that the glass can’t provide enough.  There is a great explanation of what that means in this thread http://submit.shutterstock.com/forum/viewtopic.php?t=73591 by my friend David Rehner.

In the end, either camera bodies are a world of a difference over my old 20D or 40D.  I’m going to wait and see more reviews at least until Spring of 2010 before I start whipping out my credit card. I’m waiting until I am absolutely 100% sure about this.  I think I just might have to rent one of each for a week to do my own tests.  I’m in the same boat as many other photographers, with the 20D, 30D, or 40D.  No doubt the 7D is better in more than one way, but if I can make my daily photo editing a few steps easier by spending the extra grand on the 5d2 I think it might be worth it.  Downsizing is fine, unless you want to utilize the maximum resolution that you possibly can, in order to make the most money from your images.  If I’m going to drop even $1700 on a camera, it had better produce good enough sharpness and clarity at 100% at the fullest resolution.  If not, I might as well spend the extra cash on the full frame.