Selon les exifs, 6.05m au 400mm

# Exposure Time (1 / Shutter Speed) = 1/500 second ===> 0.002 second
# Lens F-Number / F-Stop = 4/1 ===> ƒ/4
# Exposure Program = aperture priority (3)
# ISO Speed Ratings = 800
Aperture = ƒ/4
# Distance to Subject = 605/100 m
# Focal Length = 400/1 mm ===> 400 mm