Comparison of Sigma 17-50mm ƒ/2.8 EX DC OS HSM and Sony 16-50mm ƒ/2.8 DT SSM SAL1650

Attribute	Sigma 17-50mm ƒ/2.8 EX DC OS HSM ×	Sony 16-50mm ƒ/2.8 DT SSM SAL1650 ×
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Filter Size (mm)	77	72
Notes	Image Stabilized (except for Pentax and Sony mounts). Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony. Included Accessories: Case, Petal-type	For Sony A-Mount. Dust and moisture resistant. Included Accessories: ALC-SH117 Petal-shaped bayonet hood, lens caps.
Closest Focus (m)	0.28	0.3
Magnification Ratio (x)	0.2	0.2
Zoom System	Rotary with lock	Rotary
Type	Standard Zoom	Standard Zoom
APS Equivalent	1.5x: 26 - 75mm; 1.6x: 27 - 80mm	24 - 75mm
Diaphragm Blades	7	7
Image Circle	APS-C	Image Circle
Focal Length (mm)	17.00 - 50.00	16.00 - 50.00
Brand	Sigma	Sony
Name	Sigma 17-50mm ƒ/2.8 EX DC OS HSM	Sony 16-50mm ƒ/2.8 DT SSM SAL1650
Weight (g)	565	577
Diaphragm Blades Type	rounded	rounded
Lens Construction	17 elements in 13 groups, including 2 FLD glass elements	16 elements in 13 groups
Diagonal Angle of View (degree)	27.90 - 72.40	32.00 - 83.00
Length (mm)	91.8	88
Diameter (mm)	83.5	81
Focus Details	Internal, with Hyper-Sonic Motor; AF/MF switch	SSM (Super-Sonic Motor), Internal