I think you hit the issue right on the head, here:
Mako2011 wrote:
Are you saying that your copy is simply less capable than a pro camera or that it is doesn't stack up against previous Nikon's in the same price range.
I'd be a real dog to expect that a $1200 body should have the AF capability of a $2600 D700 or $5400 D3s. So, while I am saying that my D7K's AF doesn't perform as well as other "pro" bodies I've shot in the Nikon System (in my case, the D700, the D2Xs, and the D2Hs), I'm not necessarily suggesting that it should.
Except that in some ways, I am. The real "problem" (if it can be regarded as such) is that the D7K's image quality can often hold with the best bodies in the system, regardless of price. Yes, the FX bodies pull away pretty quickly as ISO climbs, but below 400 or so, the D7K is as good as it gets. It's a "problem" in that best-of-breed image quality--the incredible detail and dynamic range, particularly--comes at a price: it demands high quality optics, it demands tack focus. I've found the D7K's 16 megapixels to be
brutal in revealing camera motion, subject motion, or missed focus in ways the lower-resolution, lower-tech bodies simply weren't.
In short: the D7K's best-of-breed sensor almost requires an equally best-of-breed AF system, because it's so very capable of revealing that AF system's faults. It's the mismatch--priceless IQ, $1200 AF--that causes the trouble, even if the trouble is more a case of the shooter's expectations exceeding the whole product's price point than it is with some fundamental design failure of the product itself. I think you're absolutely right that the kinds of photographs I'm trying to pull off with the D7K really weren't at the top of the price point's design parameter list. And even then I can't really complain too loudly, because I still
did get the shots!
Finally, lest I still sound too critical, I'll also say this: Nikon has done a
terrific job of making even its cheapest DX lenses so good that they're more than ready for the D7K's demands--I'm thinking, particularly, of the 35 f/1.8G and even the kit 18-105, which can be
so sharp. They're both amazing for the price point.
So, again, I think you really do hit the crux of it, Mako: at the $1200 price point, Nikon offers a system that can shoot with the best they make in even challenging conditions, so long as you're willing to coax and cajole it into doing so. If the answer to the question, "What does one really get for the $1000 that separates a D7K from a D700" were, simply, "convenience in any shooting condition," that would seem fair to me--like very reasonable way to distinguish the "professional" bodies from the "consumer" line, and a very reasonable way to formulate expectations about what the D7K can do.
Cheers!
M.