I wondered how the focus tracking would cope against the grass, it wasn't too bad considering how quick from finding in the viewfinder to making the exposure.
Olympus E-M1MarkIII
Focal Length : 210.0mm (40-150mm + 1.4TC)
Focal length in 35 mm film : 421.0mm
ISO : 1600
Exposure compensation : 0.0 EV
Exposure mode : Manual exposure
Shutter : 1/2000 sec
Aperture : F4
ACR/PSCC