I've been musing over this subject for a long time. Numerous times I've read about this topic. Generally the response to it begins with "a good photographer can make great images with less gear than a bad photographer can with the best gear" To that I say (to myself) "duh". Lets even the playing field out and do the same analysis with the very best photographers (lets stay with nature as the various genre's do not overlap all that well). This post assumes that good technique is/was used.
I'm looking for an honest assessment from experience professional photographers. If someone disagrees I'm all about listening to their opinion(s).
My thoughts-
I'm blessed in that I am able to own some pretty decent gear (just wish that translated to income :D ). All Canon. All L glass. 1DMKIII, 1DsMKII, 1DsMKIII. I actually use all three cameras quite often. Almost daily in fact. The DMKIII is my primary sports body and the DsMKII is my backup (usually has a 70-200 f2.8L on it and I use it hand held when the action gets close. The DMKIII typically has a 300 f2.8L IS on it mounted to a monopod. ) However, I use every body (each with a different lens on it and readily available to use) when I shoot wildlife and that's what the focus of this topic is.
Observations (open to any thoughts on this)
(1) The crop factor of the DMKIII can be a blessing however I am not as happy with this camera as I am the DsMKII when it comes to shooting wildlife (macro is another story. I really like it for macro). I'm not sure how to describe my ?? dissatisfaction is too strong of a word... not sure how to describe what I feel. The DMKIII, when compared to the DsMKII and DsMKIII, especially if the image is cropped (duh) doesn't seem to have the "depth" that I get from the two higher end bodies.
(2) It might surprise some to know that of the two (DsMKII and DsMKIII) I prefer my old workhorse DsMKII to the III. Yes the extra megapixels are nice when it comes to cropping but not enough to warrant the cost of the body nor can I see a great improvement in image quality. If I could have found a "low mileage" DsMKII I would have picked it up instead of the DsMKIII. I think the DsMKII will go down in history as one of Canon's winners.
(3) The biggest complaint that I have with the DsMKIII is the size of the buffer. I don't shoot a lot of bursts (rarely actually. Even my hummingbird shots are singles) but when I do I need the camera to perform. There have been times when I missed the real shot because I was waiting for the camera to finish writing to the card. The DMKIII shines in this regard by the way. The DsMKII is pretty good too.
(4) In marginal conditions the DMKIII doesn't seem to produce the image quality that the other two bodies do. It's not unusual to see data missing at both ends when looking at a histogram of an image shot in less than optimum light.
(5) On the other hand, when the light is right, all of the camera's produce good images


