Thanks Jayson and JJphoto.
John, the 1DX and the 600 with the 2X TC is really delivering some amazing stuff.....the sharpness is unreal.....making me want one bad!
This is a Downy Woodpecker in the backyard
1d4
500mm
ISO 1000
f/4.0
1/640
http://joeleadephotography.zenfolio....40674088-4.jpg