The Canon EOS-1D Mark IV has barely changed its body shape at all compared to its predecessors. Just like the previous EOS-1D series digital SLR cameras, the 1D Mark IV is large and heavy, but fits perfectly in the hand. It is worth mentioning that Canon has done an excellent job in re-contouring the 1D Mark IV’s grip portion of the body, making it even more comfortable to hold than previous EOS-1D series digital DSLR cameras. Speaking of build quality, the 1D Mark IV is a solidly-built professional-grade digital SLR camera. Besides having a full magnesium alloy body that provides protection against knocks and bumps, the 1D Mark IV is also protected by a total of 76 rubber seals fitted around its controls and cover seams, making it dust and water resistant when used in tandem with the company’s range of weather-resistant accessories such as EF lenses and Speedlite EX flash units.
Thanks to their increased processing capacity, the dual Digic 4 processors are capable of managing the increased amount of data created by the 60% rise in image resolution, while still allowing the Canon EOS-1D Mark IV to be operated in continuous drive up to 121 large JPEG images or 28 RAW images when using a UDMA 6 card. Like the previous Canon EOS-1D Mark III, the 1D Mark IV is capable of capturing consecutive images with a continuous shooting speed of 10 frames per second, without any drop in the resolution. For this reason, the 1D Mark IV is the ultimate tool for photojournalists and sports photographers who absolutely can’t miss a shot.
When it comes to image quality, the Canon EOS-1D Mark IV is all a flagship digital SLR camera should be. It captures incredibly detailed images with great colors, no matter if you prefer to shoot in RAW or JPEG. Even compared to the already-excellent Canon EOS-1D Mark III, the 1D Mark IV delivers better pixel-level quality and offers 26% greater resolution in every image. The 1D Mark IV also stands out when it comes to shooting in extreme low lighting conditions. While its standard sensitivity range of ISO 100 – 12,800 is already impressive, you can still expand it to ISO 50 – 102,400. The by far highest maximum sensitivity ever offered by a Canon digital SLR camera of ISO 102,400 makes the 1D Mark IV also very suitable for night shots. It is worth noting that Canon decided to retain an APS-H format sensor with 1.3x crop factor on the 1D Mark IV. One nice aspect of using an APS-H format sensor is that the worst performing part of the full-frame lens image circle, the corners, can be avoided.