megapixel EOS 20D Not since February 2002 (the EOS D60) has Canon increased the resolution of this line of digital SLRs, in the EOS 20D we have a 1.9 million effective pixel increase, a new AF system, 50% faster continuous shooting and more than double the buffer space.
The D300 got a mid-life refresh with the D300s. That refresh didn't change much: it added video capabilities and a second card slot, but not much of anything else. In terms of performance, it's essentially the same camera as the 2007 original.
The Canon EOS 80D is an enthusiast-level DSLR, and the successor to the 70D. It sports a new 24MP APS-C CMOS sensor which, like the 70D, offers Canon's Dual Pixel on-sensor phase-detection autofocus system.