
Originally Posted by
Diane Miller
Bill, missed you post while I was composing my reply -- thanks for commenting. You're right about where the focus was, but not the fault of the focus system. I've done the LensAlign thing with all my lenses and the 600 is right on the money, with and without TCs. The bird was twitching and the 5D3 isn't the fastest at focus, especially with a big lens. I use back-button focus and hold it in so AI Servo is active, but it doesn't always keep up with small changes in position, and I'm even slower recomposing in-camera and way slow moving the focus point. So it's hit or miss. I need to set up a little farther away from this perch so I have more leeway to focus and recompose.