Canon's professional sports DSLR — the 1D Mark IV with 16MP APS-H sensor.
The Canon EOS-1D Mark IV was released in 2009 as Canon's penultimate professional APS-H DSLR — the last before the 1DX combined the 1D and 1Ds lines. The 16.1MP APS-H sensor (1.3x crop) provided the reach advantage of crop factor while maintaining better DOF than APS-C. 10fps burst. 45-point AF with all cross-type. Dual DIGIC 4 processors.
Outstanding professional performance for 2009. 10fps with 45-point all-cross-type AF — class-leading tracking. The APS-H 1.3x crop provides telephoto reach advantage. ISO performance excellent for the era. 1080p video with manual exposure — early Canon DSLR video capability. Dual CF card slots. The 1D Mark IV was the ultimate sports DSLR before full-frame unification.
Canon EF mount, APS-H (1.3x crop). Weight approximately 1,180 grams — professional build with integrated vertical grip. Build quality outstanding with full magnesium alloy weather sealing. Battery life exceeds 1,500 shots. The 1.3x crop provides a unique compromise — more reach than full frame, better DOF than APS-C.
Available at very low prices — two generations of successors have reduced demand. Check shutter count, AF, and sensor. A professional sports DSLR at bargain pricing. The 45-point AF and 10fps remain impressive. The APS-H format is unique — only Canon used this sensor size. Outdated but still a capable sports camera body.