Upload & Sell: On
alundeb said: "Second, to get this image with a 1DIII and a shutter speed of 1/2000, the focal length would have to be 900 mm, the aperture f/7.1 and ISO 640. Thus it makes sense to compare noise from the 7D at 400 to the 1DIII at 640. Do you disagree with this?"
No I do not disagree and I believe that I understand your point quite well. In a direct comparison between the two bodies given the same situation with the same point of view, the additional resolution of the 7D has a noise distribution that is equivalent or less than a 1.3 crop sensor camera ...if I res-up or crop the 1.3x sensor to create the same perspective.
I concede this point, however this is not how I shoot. Rather, I make images with the camera I have... moving in, moving out, and accepting the compromises that a shoot presents. When using my former 1D2 or 1D3 cameras, I found myself working harder to move in and tighten the perspective. My cost... animals fleeing faster than I'd like. In contrast, the 7D provides me with more working distance and I tend to use it. So, when I look at my images, I am comparing similar points of view. While the 7D, admittedly has amazing detail, the noise is more apparent when making a direct comparison between similar images with similar detail free areas.
What does all of this mean?... nothing! I shoot w/ a 5DII and 7D and it is likely that I will stick w/ these bodies for three key reasons...
1: they share batteries... one charger + 4 batteries goes a long way on the road.
2: the cameras, batteries and charger are relatively small and light. I travel on planes and hike with the gear... weight matters to me.
3: price... my two cameras combined cost less than a 1DIV or 1DsIII and will certainly cost less than the 1Dx. I believe that these cameras are 95% of the pro equivalents. I can live with the 5% loss, as my livelihood does not require the highest possible keeper rate (that's my ode to the pro). Fortunately for me, my ego does not require a big (or most current) camera to make me feel good about myself or my photography (that's my ode/dig to those who always must buy the best even if their skill & motivation will never warrant it).
I've said it before and I'll say it again... photography is filled with compromises. We all need to make the adjustments that meet our needs as professionals, enthusiasts, hobbyists, and occasional shooters.