Before the mark IV, there was the mark III (now both cameras), before that there was the 6D, and even earlier than that there was the Nikon D3s and the Nikon D700 already on the first shot, DDs are wider and stretch better, functioning ISO is higher, exposure metering is more accurate, and there is no need in changing.
Canon EOS 60D: 18MP CMOS Digital SLR Camera Body - Your Next Photography Companion
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Nikon D3100 DSLR Camera Body (Kit Box) - No Lens Included, International Version with No Warranty
298 Review
Canon PowerShot A480 camera, black
108 Review
Revamped Sony Alpha a6000 Mirrorless Digital Camera: 24.3MP SLR Camera with 3.0-Inch LCD and Power Zoom Lens
103 Review