Originally posted by ehrwien Second shot looks quite okay. Don't know how the action mode operates, but it chose shutter times way too long. It's not you or the camera that is responsible for the blur, it's the runners, and the monopod doesn't help with stabilizing them. I assume you wanted to freeze their motion rather than catching blurry people on the sensor?
My approach would have been TAv mode with open aperture and a way shorter shutter time (second shot at 1/160 s looks okay, perhaps cut that in half to 1/320 or even more), letting the camera choose the ISO, allowing it to go as high as it must, be that 1600, 3200 or even 6400
Thank you everyone. I have happily concluded my gear is sound, and I have strategies to address the operator operations. In answer to your questions. . . . . .
1. Yes, I wanted to freeze action.
2. Sport mode (I just discovered) does not override manually set ISO.
3. Snaps were taken late afternoon 5:30 to 6:30 PM
4. Yes, the aperture stayed open for the full second.
Thanks again!