Comparison of Sigma 70-300mm f/4-5.6 DG OS and Tamron SP AF 200-500mm f/5-6.3 Di LD IF

Attribute	Tamron SP AF 200-500mm f/5-6.3 Di LD IF ×	Sigma 70-300mm f/4-5.6 DG OS ×
Diaphragm Blades Type	-	rounded
Notes	Available mounts: Canon, Minolta, Nikon	Image Stabilization. Available AF Mounts: Sigma, Canon, Nikon, Pentax, Sony. For Pentax and Sony mount, when the OS function of lens body is used, pl
Aperture (f)	5.00 - 32.00	4.00 - 22.00
Magnification Ratio (x)	0.2	0.26
Filter Size (mm)	86	62
Focus Details	Internal	-
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	1.5x: 300 - 750mm; 1.6x: 320 - 800mm	1.5x: 105 - 450mm;1.6x: 112 - 480mm
Diaphragm Blades	9	9
Image Circle	Image Circle	35mm
Focal Length (mm)	200.00 - 500.00	70.00 - 300.00
Brand	Tamron	Sigma
Name	Tamron SP AF 200-500mm f/5-6.3 Di LD IF	Sigma 70-300mm f/4-5.6 DG OS
Weight (g)	1237	610
Zoom System	Rotary	Rotary
Length (mm)	227	126.5
Diameter (mm)	93.5	76.5
Closest Focus (m)	2.5	1.5
Diagonal Angle of View (degree)	5.00 - 12.00	-
Lens Construction	13 elements in 10 groups, including two LD (Low Dispersion) elements	16 elements in 11 groups, including 1 SLD element