Canon 1D Mark IV APS-H dSLR
the last of the APS-H 1.3x crop sensor pro dSLRs
see also:
Canon EOS camera system
Canon 1D Mark III digital SLR
Canon 1D X sports dSLR
introduction
introduced in 2009 largely to address the AF issues with the
Canon 1D Mark III digital SLR
main differences apart from the totally re-vamped AF system include:
16mp 10fps, 920K LCD, 45pt AF (39 X-type), 1080p HD video at 30/25/24 fps; CF UDMA support;
see
dpreview.com
it's replacement in 2011, the
Canon 1D X sports dSLR
is a full frame sensor sports dSLR