Comparison of Sigma 120-300mm f/2.8 EX DG OS HSM APO and Sony 500mm f/4 G SSM SAL-500F40G

Attribute	Sony 500mm f/4 G SSM SAL-500F40G ×	Sigma 120-300mm f/2.8 EX DG OS HSM APO ×
Diaphragm Blades Type	rounded	rounded
Notes	Sony A-mount. Weather and dust resistant. Built to order. Carbon fiber lens hood included.	Image Stabilized (up to 4 stops). Available AF Mounts: Sigma, Canon, Nikon. Included Accessories: Bayonet type Hood (LH1128-01), Tripod socket (TS-31
Aperture (f)	4.00 - 32.00	2.80 - 22.00
Magnification Ratio (x)	0.135	0.12
Filter Size (mm)	42	105
Diameter (mm)	140	114.4
Type	Telephoto Prime	Telephoto Zoom
Diaphragm Blades	9	9
Lens Construction	11 elements in 10 groups, including 3 ED elements; AR Nano Coating	23 elements in 18 groups, including 1 SLD and 2 FLD elements
Focal Length (mm)	500.00	120.00 - 300.00
APS Equivalent	750mm	1.5x: 180 - 450mm; 1.6x: 192 - 480mm
Image Circle	35mm	35mm
Brand	Sony	Sigma
Name	Sony 500mm f/4 G SSM SAL-500F40G	Sigma 120-300mm f/2.8 EX DG OS HSM APO
Diagonal Angle of View (degree)	5.00	8.20 - 20.40
Focus Details	Internal; SSM (Super Sonic wave Motor); 4 focus hold buttons, two-way DMF (Direct Manual Focus) mode button and focus range switch	Internal; HSM with full-time manual override
Zoom System	-	Rotary; Internal
Length (mm)	367.5	289.2
Weight (g)	3.46	-
Closest Focus (m)	4	1.5