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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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Sigma 500mm f/4 DG OS HSM Sports lens vs. Nikon 500mm f/4E FL ED VR lens comparison review - Nikon Rumors
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