Comparison of Sigma 18-50mm f/2.8 EX DC and Sony E 16-55mm f/2.8 G SEL1655G

Attribute	Sony E 16-55mm f/2.8 G SEL1655G ×	Sigma 18-50mm f/2.8 EX DC ×
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Filter Size (mm)	67	67
Notes	Sony E-mount; Dust and moisture resistant; Includes ALC-SH161 Petal-shaped lens hood.	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax, Four-Thirds
Closest Focus (m)	0.33	0.28
Magnification Ratio (x)	0.66	0.2
Diameter (mm)	73	74.1
Type	Standard Zoom	Standard Zoom
APS Equivalent	24 - 82.5mm	1.5x: 27 - 75mm; 1.6x: 28.8 - 80mm
Diaphragm Blades	9	7
Image Circle	APS-C (Sony E-Mount)	Image Circle
Focal Length (mm)	16.00 - 55.00	18.00 - 50.00
Brand	Sony	Sigma
Name	Sony E 16-55mm f/2.8 G SEL1655G	Sigma 18-50mm f/2.8 EX DC
Weight (g)	494	445
Diagonal Angle of View (degree)	29.00 - 83.00	27.90 - 69.30
Lens Construction	17 elements in 12 groups, including 2 aspherical, 2 AA (advanced aspherical) and 3 ED elements; Nano AR coating	15 elements in 13 groups, including two aspherical elements and one Special Low Dispersion (SLD) lens
Zoom System	Rotary	Rotary, non-telescoping
Length (mm)	100	84.1
Diaphragm Blades Type	circular	-
Focus Details	Internal; XD Linear Motor with Focus Hold button, AF/MF switch, Linear Response MF	Internal focusing system