Comparison of Canon EF 70-300mm f/4-5.6 IS USM and Sigma 50-200mm ƒ/4-5.6 DC OS HSM

Attribute	Canon EF 70-300mm f/4-5.6 IS USM ×	Sigma 50-200mm ƒ/4-5.6 DC OS HSM ×
Aperture (f)	4.00 - 32.00	4.00 - 22.00
Filter Size (mm)	58	55
Notes	Image Stabilization	Available AF Mounts: Sigma, Canon, Nikon, Sony, Pentax. Included Accessories: Case, Lens Hood. Optical Stabilization.
Closest Focus (m)	1.5	1.1
Magnification Ratio (x)	0.26	0.22
Diameter (mm)	76.5	74.4
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	112 - 480mm	1.5x: 75-300mm; 1.6x: 80-320mm
Lens Construction	15 elements in 10 groups	14 elements in 10 groups, including 1 SLD element
Image Circle	35mm	APS-C
Focal Length (mm)	70.00 - 300.00	50.00 - 200.00
Brand	Canon	Sigma
Name	Canon EF 70-300mm f/4-5.6 IS USM	Sigma 50-200mm ƒ/4-5.6 DC OS HSM
Weight (g)	630	420
Diagonal Angle of View (degree)	8.00 - 34.00	7.10 - 27.90
Focus Details	Front-focusing method with helicoid ring drive	Internal; HSM with full-time manual override
Zoom System	Rotary	Rotary
Length (mm)	142.8	101.9
Diaphragm Blades	-	8
Front Element Rotation	-	-