Comparison of Pentax 560mm f/5.6 ED AW HD DA and Sigma 120-300mm f/2.8 EX DG OS HSM APO

Attribute	Pentax 560mm f/5.6 ED AW HD DA ×	Sigma 120-300mm f/2.8 EX DG OS HSM APO ×
Aperture (f)	5.60 - 45.00	2.80 - 22.00
Filter Size (mm)	112	105
Notes	Built-in slide-out lens hood. Included accessories: case, tripod adapter.	Image Stabilized (up to 4 stops). Available AF Mounts: Sigma, Canon, Nikon. Included Accessories: Bayonet type Hood (LH1128-01), Tripod socket (TS-31
Closest Focus (m)	5.6	1.5
Magnification Ratio (x)	0.1	0.12
Diameter (mm)	130	114.4
Type	Telephoto Prime	Telephoto Zoom
APS Equivalent	859mm	1.5x: 180 - 450mm; 1.6x: 192 - 480mm
Diaphragm Blades	9	9
Image Circle	APS-C	35mm
Focal Length (mm)	560.00	120.00 - 300.00
Brand	Pentax	Sigma
Name	Pentax 560mm f/5.6 ED AW HD DA	Sigma 120-300mm f/2.8 EX DG OS HSM APO
Weight (g)	3.04	-
Diaphragm Blades Type	rounded	rounded
Lens Construction	6 elements in 5 groups	23 elements in 18 groups, including 1 SLD and 2 FLD elements
Diagonal Angle of View (degree)	2.90	8.20 - 20.40
Length (mm)	522	289.2
Zoom System	-	Rotary; Internal
Focus Details	Internal with DC motor; Quick-Shift Focus system	Internal; HSM with full-time manual override