The image quality of the 16-megapixel Canon 1D Mark IV is the best overall I’ve yet seen out of Canon, but the small 5.7-micron photosites demand high focus accuracy, top optics, and an attention to diffraction in order to extract the very best image quality from those pixels.
Sharpness is very impressive with the Canon 1D Mark IV, which suggests to me a relatively weak anti-aliasing filter. This is a Good Thing.
Noise control is Canon’s best yet, never mind boring tests: having shot the 5D Mark II and 1Ds Mark III extensively over more than a year, I’ll take the fine-grained noise of the 1D Mark IV, along with its film-like structure, a pleasant deviation from the previous pattern-noise headaches of its 21MP siblings.
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