Comparison of Olympus 14-54mm f/2.8-3.5 Zuiko Digital and Sigma 18-50mm f/2.8 EX DC

Attribute	Sigma 18-50mm f/2.8 EX DC ×	Olympus 14-54mm f/2.8-3.5 Zuiko Digital ×
Zoom System	Rotary, non-telescoping	Rotary
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diagonal Angle of View (degree)	27.90 - 69.30	23.00 - 75.00
Filter Size (mm)	67	67
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax, Four-Thirds	Includes Lens Hood (LH-70), Lens Case (LSC-0816); Compatible with TC-14 Teleconverter and EX-25 Extension Tube
Focus Details	Internal focusing system	-
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	7	7
Lens Construction	15 elements in 13 groups, including two aspherical elements and one Special Low Dispersion (SLD) lens	15 elements in 11 groups, including 3 asperical elements
Image Circle	Image Circle	Image Circle
Focal Length (mm)	18.00 - 50.00	14.00 - 54.00
Brand	Sigma	Olympus
Name	Sigma 18-50mm f/2.8 EX DC	Olympus 14-54mm f/2.8-3.5 Zuiko Digital
Weight (g)	445	435
Diameter (mm)	74.1	73.5
Length (mm)	84.1	88.5
35mm Equivalent	-	28 - 108mm
Magnification Ratio (x)	0.2	0.26
APS Equivalent	1.5x: 27 - 75mm; 1.6x: 28.8 - 80mm	-
Closest Focus (m)	0.28	0.22