Rimwalker wrote in post #9084168
Here's a question for 7D owners regarding low ISO noise; I've read the argument here that the 7D's image quality shouldn't be judged on a 100 percent crop, but at similar print sizes to what you'd print out of a 10 or 12 megapixel camera. But my question is, why have 18 megapixels to print the same size as previous cameras? The crop-ability of the 7d has been touted for bird and wildlife photographers who need to get even closer than the lens allows, so isn't it valid to judge the 7D on crops, if it's supposed to be an advantage? I'm not trying to attack the camera, just a possible logical fallacy in previous discussions.
I don't think people buy a high MP camera with the intention to crop. They crop out of necessity (in case their lenses aren't long enough, or they couldn't get a better composition. Having more MP gives you more leeway to do so, but doesn't mean you should be cropping at 100%. If you're doing so, then you were using the wrong lens to begin with.
Besides, what do you say to the guys/gals shooting 10-12mp cameras when all they do is print 4x6's and/or post photos on the web? For web photos, you wouldn't need a camera with more than 1mp sensor?
So what are you really judging? 100% pixel peeping? Or wouldn't you rather judge 100% Field of View?
When you stick a 500L on a 40D and look through the VF and aim for a BIF, you'd get practically the "same" view (FoV) as the 500L stuck on a 7D. So when you come home and upload the images, which one do you think would give you more detail to work with? 18mp? or 10mp?