Ed,
The batters were shot from just outside the fence around the outfield, softball fields aren't as deep as baseball so a 400mm does pretty well. The batters were cropped on average from around 20% of the total 1DX III sensor area.
I could have used a 1.4X with the 400 but the resulting 560mm leaves a big gap between it and the 70-200 on the second body so I have found that the bare 400 works pretty well for both softball and baseball at the high school level.
Rodger
EOS 1DX M3, 1DX M2, 1DX, 5DS R, M6 Mark II, 1D M2, EOS 650 (film), many lenses, XF400 video
