Comparison of Olympus 7-14mm ƒ/2.8 Pro M.Zuiko Digital ED and Sigma 8-16mm ƒ/4.5-5.6 DC HSM

Attribute	Sigma 8-16mm ƒ/4.5-5.6 DC HSM ×	Olympus 7-14mm ƒ/2.8 Pro M.Zuiko Digital ED ×
Zoom System	Rotary	Rotary
Diaphragm Blades Type	-	circular
Diagonal Angle of View (degree)	75.70 - 114.50	75.00 - 114.00
Notes	Available AF Mounts: [HSM version]: Sigma, Canon, Nikon; [w/o HSM]: Minolta, Pentax	Weather sealed; Fixed lens hood and pinch-style lens cap LC-79 included.
Aperture (f)	4.50 - 29.00	2.80 - 22.00
APS Equivalent	1.5x: 12 - 24mm; 1.6x: 12.8 - 25.6mm	-
Type	Ultra Wide Zoom	Wide Zoom
Diaphragm Blades	7	7
Lens Construction	15 Elements in 11 Groups, including 3 aspherical and 4 FLD elements	14 elements in 11 groups, including 2 aspherical ED, 1 double-sided aspherical, 1 aspherical, 3 Super ED , 1 ED and 2 HR elements
Image Circle	APS-C	Image Circle
Focal Length (mm)	8.00 - 16.00	7.00 - 14.00
Brand	Sigma	Olympus
Name	Sigma 8-16mm ƒ/4.5-5.6 DC HSM	Olympus 7-14mm ƒ/2.8 Pro M.Zuiko Digital ED
Weight (g)	555	534
Diameter (mm)	105.7	78.9
Length (mm)	75	105.8
35mm Equivalent	-	14 - 28mm
Magnification Ratio (x)	0.13	0.11
Focus Details	Internal Focus; HSM with full-time manual override	-
Closest Focus (m)	0.24	0.2