jrista, FANTASTIC TEACHING! Thank you! Is this actually your profession or your hobby? I think you should post a small summary into Nikonrumors. Or it should be linked to the D800 manual
Aye, your welcome. This is really just a hobby...I like to know how things work.
I'd love to post a summary to Nikon rumors, however I'd probably get flamed into oblivion. Keep in mind, the D800 is actually a lower spatial resolution than the 7D by a fair percentage (you would need a 47mp FF sensor to have 4.3 micron pixels), and as such, its still well within the realm where it can produce very nice, sharp photos, so it really is a good camera...just keep in mind, it has about 87% the resolution of the 7D, so the 7D is pushing the limits quite a bit more than the D800 is. I wasn't trying to indicate people should not buy a D800, actually I think its an excellent camera for those who explicitly need high quality, high resolution photographs.
This sound perfectly like the Theory of Constraints! http://en.wikipedia.org/wiki/Theory_of_constraints
I think a number of persons need to read this detail jrista has gone into.
YUP! The theory of constraints applies to a lot of things. Its actually rather sad that it is referred to rather infrequently in general theory of things like Cameras.
jrista, Thank you! you just cured my "24 megapixelitis for 7D2"!
Glad to be of service. To qualify that, though....if Canon could produce a 24mp APS-C sensor that had considerably less noise than the 7D, and supported an extra stop or two of high ISO...I'd buy one. The 7D is at limits as much because its pushing resolution as it is because its electronic noise is a bit too high for that resolution. Electronic noise and an aggressive low-pass filter does eat into the "fine" detail that the 7D is theoretically capable of resolving. Nothing you can do about photon noise, but improving electronic noise would make a higher resolution 7D II sensor more capable of recording that finer level of detail that a similar-megapixel FF sensor could not resolve. If a 24mp 7D II was capable of cleanly resolving super fine detail (which the current 7D is marginally able to do), then it WOULD still be worth it.
I agree with the others here; It is really educational, and I really like when people are willing to get into the essence of things. That said, I realise that a lot of this is far over my head, but that does not diencourage me, rather, I realize that there are new interesting things to learn about.
You said that there is nothing one can do about photon noise, and that struck me as strange. You are probably right, but as a general rule I am sceptic to deterministic statements. If there is one thing we have learned from the history of science, - is that what at a certain point in time seemed to be impossible, are suddendly resolved. I will not quote Kuhn here, but reconfigurations of knowledge, old discarded ideas are brought to life again with the support of supplementary technology and knowledge and so forth.. Just a thought.