Comparison of Olympus 14-45mm f/3.5-5.6 Zuiko Digital and Sigma 18-50mm f/3.5-5.6 DC

Attribute	Olympus 14-45mm f/3.5-5.6 Zuiko Digital ×	Sigma 18-50mm f/3.5-5.6 DC ×
Notes	Includes Lens Hood (LH-61); Compatible with TC-14 Teleconverter and EX-25 Extension Tube	Available AF Mounts: Canon, Nikon, Minolta/Sony, Pentax, Four-Thirds, Sigma; HSM version available for Nikon mount
Aperture (f)	3.50 - 22.00	3.50 - 22.00
Magnification Ratio (x)	0.26	0.29
Filter Size (mm)	58	58
Focus Details	-	Internal; HSM version available for Nikon mount
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	7	7
Diameter (mm)	71	62
Image Circle	Image Circle	Image Circle
Focal Length (mm)	14.00 - 45.00	18.00 - 50.00
Brand	Olympus	Sigma
Name	Olympus 14-45mm f/3.5-5.6 Zuiko Digital	Sigma 18-50mm f/3.5-5.6 DC
Weight (g)	285	250
Diagonal Angle of View (degree)	27.00 - 75.00	27.90 - 69.30
Lens Construction	12 elements in 10 groups, including 2 asperical elements	8 elements in 8 groups
Zoom System	Rotary	Rotary
Front Element Rotation	-	-
35mm Equivalent	28 - 90mm	-
Length (mm)	86.5	67.5
APS Equivalent	-	1.5x: 27 - 75mm; 1.6x: 28.8 - 80mm
Closest Focus (m)	0.38	0.25