[M_Six]

Thanks, Dave. I was using single (center) autofocus and was trying to keep the center point on the plane. I was using AI Focus, but it was the first time and I probably kept re-pressing the shutter halfway to focus instead of letting the camera do the work (like the first time you use ABS brakes). Even so, the 55-250mm isn't the sharpest lens with a stock-still subject, so...

Next time I'll try the multi-point focus and see if I can set the points to cluster in near the center. Not sure if I can do that on a T1i body.