Comparison of Sigma 55-200mm f/4.5-5.6 DC and Sony 55-200mm f/4-5.6 DT SAL-55200

Attribute	Sigma 55-200mm f/4.5-5.6 DC ×	Sony 55-200mm f/4-5.6 DT SAL-55200 ×
Magnification Ratio (x)	0.22	0.29
Filter Size (mm)	55	55
Front Element Rotation	-	-
Closest Focus (m)	1.1	0.95
Diameter (mm)	71.5	71.5
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	1.5x: 82.5 - 300mm; 1.6x: 88 - 320mm	82.5 - 300mm
Diagonal Angle of View (degree)	7.10 - 25.50	8.00 - 28.80
Image Circle	Image Circle	APS-C
Focal Length (mm)	55.00 - 200.00	55.00 - 200.00
Brand	Sigma	Sony
Name	Sigma 55-200mm f/4.5-5.6 DC	Sony 55-200mm f/4-5.6 DT SAL-55200
Weight (g)	310	295
Notes	Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony, Four-Thirds; HSM version available for Nikon mount	Includes SH0007 solid-circular lens hood.
Diaphragm Blades	8	9
Aperture (f)	4.50 - 22.00	4.00 - 32.00
Lens Construction	12 elements in 9 groups	13 elements 9 groups including 1 ED glass element
Zoom System	Rotary	Rotary
Length (mm)	87.1	85
Diaphragm Blades Type	-	circular
Focus Details	Internal; HSM version available for Nikon mount	Front focusing