Comparison of Olympus 14-54mm f/2.8-3.5 Zuiko Digital and Sigma 18-50mm ƒ/2.8-4.5 DC OS HSM

Attribute	Sigma 18-50mm ƒ/2.8-4.5 DC OS HSM ×	Olympus 14-54mm f/2.8-3.5 Zuiko Digital ×
Zoom System	Rotary	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, Sony, Pentax. Included Accessories: Case, Lens Hood. Optical Stabilization.	Includes Lens Hood (LH-70), Lens Case (LSC-0816); Compatible with TC-14 Teleconverter and EX-25 Extension Tube
Focus Details	Internal with HSM	-
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	7	7
Lens Construction	16 elements in 12 groups, including 2 SLD and 3 aspherical lenses	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 ƒ/2.8-4.5 DC OS HSM	Olympus 14-54mm f/2.8-3.5 Zuiko Digital
Weight (g)	395	435
Diameter (mm)	74	73.5
Length (mm)	88.6	88.5
35mm Equivalent	-	28 - 108mm
Magnification Ratio (x)	0.24	0.26
APS Equivalent	1.5x: 27 - 75mm; 1.6x: 28.8 - 80mm	-
Closest Focus (m)	0.3	0.22