Appealing most to sports shooters, news photographers, and any others who need a solid, weatherresistant workhorse body, Canon’s EOS-1D series has long been a leader in camera technology. The latest in this line, the EOS-1D Mark IV ($5,000, body only) brings with it a new 16.1MP CMOS APS-H (1.3X lens factor) sensor, as well as a new 45-point autofocus system, full 1920x1080-pixel 30-frames-per-second video capture, and sensitivity of up to ISO 102,400. But how did it fare in our lab and field testing? Read on. Imaging Scores High