Okay, here is my attempt at posting images. The first one was taken with the Tokina 28-70, speed 1/125, f/9.0, ISO 1600, no adjustments made except that Lightroom applies a +25 sharpening, no cropping. The second one was taken with the Tokina 80-400, speed 1/125, f11.0, ISO 100, no adjustments (except +25 sharpening), no cropping. The third one was also taken with the Tokina 28-70, speed 1/125, f2.8, ISO 1600, minimal cropping. Zoom in a bit to see what you think. I usually pick the face or eyes as a focus point. All images were shot Raw DNG and then exported to Jpeg. Tokina did say they could try to recalibrate the lenses but there were no guarantees. The 28-70 will not lock focus at 28mm, I have to zoom in a touch to get it to work.