Comparison of Olympus 50-200mm f/2.8-3.5 ED SWD Zuiko Digital and Sigma APO 100-300mm f/4 EX IF HSM

Attribute	Sigma APO 100-300mm f/4 EX IF HSM ×	Olympus 50-200mm f/2.8-3.5 ED SWD Zuiko Digital ×
Aperture (f)	4.00 - 32.00	2.80 - 22.00
Diaphragm Blades Type	-	circular
Filter Size (mm)	82	67
Notes	Available AF Mounts: [100-300mm F4 APO EX IF HSM]: Sigma, Canon, Nikon; [100-300mm APO F4 EX IF]: Minolta, Pentax	Dust and drip proof. Includes Lens Hood (LH-70C) and Lens Case (LSC-1220)
Focus Details	Internal; HSM with full-time manual override	-
Type	Telephoto Zoom	Telephoto Zoom
Diaphragm Blades	9	9
Diameter (mm)	92.4	86.5
Image Circle	35mm	Image Circle
Focal Length (mm)	100.00 - 300.00	50.00 - 200.00
Brand	Sigma	Olympus
Name	Sigma APO 100-300mm f/4 EX IF HSM	Olympus 50-200mm f/2.8-3.5 ED SWD Zuiko Digital
Weight (g)	1440	995
Diagonal Angle of View (degree)	8.20 - 24.40	6.20 - 24.00
Lens Construction	16 elements in 14 groups, including 4 SLD elements	16 elements in 15 groups, including 3 ED elements
Zoom System	Rotary; Internal	Rotary
Closest Focus (m)	1.8	1.2
35mm Equivalent	-	100 - 400mm
Length (mm)	226.5	157
APS Equivalent	1.5x: 150 - 450mm; 1.6x: 160 - 480mm	-
Magnification Ratio (x)	0.2	0.21