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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 Sport or used Nikon 500mm F4 VR1/2: Nikon SLR Lens Talk Forum: Digital Photography Review
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Amazon.com : Sigma 500mm f/4.5 EX DG IF HSM APO Telephoto Lens for Nikon SLR Cameras : Camera Lenses : Electronics
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