Tree Swallows having a heated discussion, D500 and Sigma 500mm f4 sport, hand held, at 500mm f/4.5, ISO 180, shutter speed 1600. PP using DXO PhotoLab Elite and Affinity photo. : r/Nikon
Sigma 500mm F4.5 EX DG HSM Lens Review and Specs
Sigma 500mm F4 DG OS HSM Sports review | Digital Camera World