1D MK IV is in a league of its own, in a class by itself
Kenneth G. Nielsen "Kenneth", Amazon
2 November 2014
Summary: Top of the line professional camera. When you study the results on Canon forums you begin to see that it takes a good photographer to take good pictures, then comes the glass, the all-important lenses that yield the best results begin to show that this is the next important area that leads to taking...
Summary: This is a professional level DSLR. For sports and wildlife at 10fps and a crop factor of 1.3 it just doesn't get better than this. If you are lucky enough to find one, go for it, you will never regret it.
My experience with the Mark IV that I purchased has been satisfactory!
10 December 2012
Summary: I own two Mark 111s. I wanted the Mark IV for the video and the enhanced pixels. I chose to go the Mark IV route because I continue to want the magnification factor--as I am primarily a bird photographer/wildlife photographer. I purchased a camera body that showed several blemioshes.
It is a (5) Star Value if you can find one in mint condition.
10 October 2012
Summary: I have owned a 1D Mark III for many years and I wanted to upgrade to higher level without giving up the 1.3X crop factor. The 1D Mark IV was the ideal choice. I purchased the Mark IV from KEH on eBay, and the product was exactly as they described.