My comments/questions are about D800 and weddings. When I think about the D800 in the context of landscapes, studio work, and architecture might the camera makes sense. But I keep reading and hearing people say that the D800 will be great for wedding photographers, and, well, this one isn't so clear to me.

Maybe I'm missing something, but perhaps someone can explain to me why this is so.

My sense of weddings is that the light is often problematic, i.e. not enough of it! (Just humor me and, for purposes of this question, put aside any thoughts of being able to use additional off-camera lighting.) So, for me, if a camera is a "good camera for wedding photographers" then it should have very good low-light ability. While I don't expect the D800 to have the low-light ability of the D4 (or even D3s), I wonder whether it will have the ability of even the D700 at, say, between ISO 800/1000 and 3200 (and that would be great if the D800 matched the D700 in this ISO range).

One of the D800 beta testers (http://weblog.robvanpetten.com/archive/nikon-d800) said this:

"The inherent file size can require some unusual treatment. The large capture can make the camera sensitive to vibration more than smaller cameras, requiring faster shutter speeds or a tripod. Even in the studio with flash, I used a tripod on shots done with a 200mm F/2 lens."

This beta tester is more of studio/fashion photographer, but I thought the comment very noteworthy in the context of weddings.

Additionally, yes, I have read that some say if you down sample the 36mp image it might actually increase sharpness ... and some say that down sampling improves ISO and results in a better 12mp image than does a 12mp camera ... and that down sampling is easily accomplished via Lightroom or PS ... but something about the idea of buying a 36mp camera to use it at 12mp just seems/feels odd. Of course, I wouldn't think that any competent wedding photographer would shoot a wedding with the expectation that down sampling is going to save focus/movement/narrow depth of field errors. But if one's explanation for why this is a great wedding camera heavily relies on the benefits of down sampling, well, I might wonder whether this a camera for the professional (or less than professional) wedding photographer.

I'm curious to know whether those who snap weddings with, say, a digital Hasselblad, regularly down sample. Maybe they do; I don't know.

Anyway, this might just be my hangup. The D800 hasn't even been widely tested yet and further tests might alleviate my puzzlement; but at the moment I'm not sold that this is a good camera for wedding photographers. I'm not saying it's not, just not saying it is.