Comparison of Nikon 120-300mm f/2.8E FL ED SR VR AF-S Nikkor and Sigma APO 300mm ƒ/2.8 EX DG HSM

Attribute	Nikon 120-300mm f/2.8E FL ED SR VR AF-S Nikkor ×	Sigma APO 300mm ƒ/2.8 EX DG HSM ×
Notes	Optical image stabilization; Weather-resistant	Available AF Mounts: [HSM version]: Sigma, Canon, Nikon; [w/o HSM]: Minolta, Pentax
Magnification Ratio (x)	0.16	0.13
Filter Size (mm)	112	46
Length (mm)	303.5	214.5
Closest Focus (m)	2	2.5
Diagonal Angle of View (degree)	8.20 - 20.30	8.20
Focus Details	Internal; AF-S with AM/MA/M switch, focus limiter, memory recall	Internal; HSM with full-time manual override
Focal Length (mm)	120.00 - 300.00	300.00
APS Equivalent	1.5x: 180 - 450mm	1.5x: 450mm; 1.6x: 480mm
Brand	Nikon	Sigma
Image Circle	35mm	35mm
Name	Nikon 120-300mm f/2.8E FL ED SR VR AF-S Nikkor	Sigma APO 300mm ƒ/2.8 EX DG HSM
Weight (g)	3250	2400
Type	Telephoto Zoom	Telephoto Prime
Aperture (f)	2.80 - 22.00	2.80 - 32.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	-
Lens Construction	25 elements in 19 groups, including 1 ED lens element, 2 fluorite elements,1 SR element; Nano Crystal and ARNEO coats	11 elements in 9 groups, including 2 ELD elements
Zoom System	Rotary	-
Diameter (mm)	128	119