10 MP is not enough if you are focal length constrained.
For example, I have a 400mm F5.6 L as my birding lens. I cannot afford the 500mm, 600mm, or 800mm lenses. They are just too expensive. So I am contrained to 400mm.
with the 400mm F5.6 L ...
A 7D (18 MP) gives 18 MP and a field of view equivalent to 640mm.
A 5D (12.8 MP) gives 5.1 MP when cropped to the 7D field of view.
A 1D Mark III (10 MP) gives about 5.6 MP when cropped to the 7D field of view.
The 1D Mark III is awesome if you can use longer lenses.
But when constrained to 400mm the 7D puts far more pixels on the bird.
I have found the 7D crop-ability to be excellent. I have also found noise levels to be very good. The 1D Mark III might be cleaner at some ISO\'s but it is of little use if I do not end up with enough pixels on my subject.
Nov 04, 2009 at 06:49 PM
Previous versions of abqnmusa's message #7733549 « 7D vs 1D mkIII »
