SYS wrote in post #18926094
Hope to see some bird photographers' experience with the 90D here soon....
I took a bunch of bird photos today....swapping back and forth between my 1DXII and the 90D at higher ISO in gray, dark conditions. The 90D is VERY impressive with a 600mm II and a 1.4xIII. I'll post some shots later.
Below is a apples to apples, straight from the camera...nothing done, but scale to 1600 wide (and subject crop). Lens was mounted on a tripod and remained in the same spot. The 90D doesn't look much different grain-wise (ISO 5000). At distance, the 90D killed the 1DX on detail (license plates, signs, bricks), as would be expected. Autofucus takes a lot longer, but very reasonable.
1DXMkII Cropped to same relative size as 90D