Yo, all the masters out there, I hope you could help me out here.
I have been encountering this issue for some time now.
Shutter speed: 1/200
focal length: 420mm (300mm + 1.4x teleconverter)
I have manually selected the center focus point in my 40D.
My question is, how come only the head and the legs of this bird turned out sharp, the rest of the body are out of focus, btw, I have pointed the center focus point at the head of the bird.
Some of my other shots are the same too.