helicopter, Nikon D3, Sigma APO 400mm F5.6
500px.com © TakehikoHigo
DSC, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
DSC, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
DSC, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
DSC, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
DSC, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Northern Mockingbird, Nikon D7100, Sigma APO 400mm F5.6
500px.com © lisa schauer
Bull Oryx, Nikon D7100, Sigma APO 400mm F5.6
500px.com © lisa schauer
Dive, Nikon D7100, Sigma APO 400mm F5.6
500px.com © lisa schauer
Curve-billed Thrasher, Nikon D7100, Sigma APO 400mm F5.6
500px.com © lisa schauer
Twilight Moon, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
DSC, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
DSC, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Pigeon flying, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Standing Out in a, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Roof Strutter, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Roof Strutter, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Eland, Nikon D700, Sigma APO 400mm F5.6
500px.com © Tom Davill
Black Hills of South, Nikon D800E, Sigma APO 400mm F5.6
500px.com © Travis Rymer
Landing, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
The Conductor, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Autumn Curtain, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Flappy Birds, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Lone Cruiser, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Drake, Nikon D7100, Sigma APO 400mm F5.6
500px.com © Ken Baumgarten
Tiger, Nikon D700, Sigma APO 400mm F5.6
500px.com © Tom Davill
Swamp Thing, Nikon D810, Sigma APO 400mm F5.6
500px.com © Michael V. Jamieson
Moose, Nikon D7100, Sigma APO 400mm F5.6
500px.com © lisa schauer
115, Nikon D7000, Sigma APO 400mm F5.6
flickr.com © Glenn Atkins
109, Nikon D7000, Sigma APO 400mm F5.6
flickr.com © Glenn Atkins