Comparison of Nikon 80-400mm ƒ/4.5-5.6G ED VR AF-S Nikkor and Sigma 120-400mm f/4.5-5.6 DG OS HSM APO

Attribute	Sigma 120-400mm f/4.5-5.6 DG OS HSM APO ×	Nikon 80-400mm ƒ/4.5-5.6G ED VR AF-S Nikkor ×
Notes	Optically Stabilized; Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony	Vibration Reduction (VR) allows for up to four stops of image stabilization
Magnification Ratio (x)	0.24	0.175
Filter Size (mm)	77	77
Length (mm)	203.5	203
Closest Focus (m)	1.5	1.75
Diagonal Angle of View (degree)	-	6.20 - 30.20
Focus Details	Internal, with HSM	AF-S with Silent Wave Motor (SWM), Focus mode switch (A/M, M/A and M); Focus limiter switch
Focal Length (mm)	120.00 - 400.00	80.00 - 400.00
APS Equivalent	1.5x: 180 - 600mm; 1.6x: 192 - 640mm	120 - 600mm
Brand	Sigma	Nikon
Image Circle	35mm	35mm
Name	Sigma 120-400mm f/4.5-5.6 DG OS HSM APO	Nikon 80-400mm ƒ/4.5-5.6G ED VR AF-S Nikkor
Weight (g)	1750	1570
Type	Telephoto Zoom	Zoom
Aperture (f)	4.50 - 22.00	4.50 - 40.00
Diaphragm Blades	9	9
Diaphragm Blades Type	-	rounded
Lens Construction	21 elements in 15 groups, including 3 SLD elements	20 elements in 12 groups, including 1 Super ED and 4 ED glass elements; Nano Crystal Coat
Zoom System	Rotary	Rotating
Diameter (mm)	92.5	95.5