Canon tonight finished its last major DSLR update of the past year and launched the EOS 1D Mark IV as its highest-end camera. The new model jumps from a 10-megapixel APS-H (near full-frame) sensor to a 16-megapixel, 1.3X crop unit and upgrades to twin DIGIC IV processors. The boost gives it 1080p video at 30 frames per second, or 720p at 60 frames per second, while still shooting full-quality still images at up to 10 frames per second. It can also match the Nikon D3s' ISO 102,400 light sensitivity and so can shoot in extremely low light
