Comparison of Olympus 7-14mm ƒ/2.8 Pro M.Zuiko Digital ED and Sigma 12-24mm ƒ/4.5-5.6 EX DG Aspherical HSM

Attribute	Sigma 12-24mm ƒ/4.5-5.6 EX DG Aspherical 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)	84.10 - 122.00	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 - 22.00	2.80 - 22.00
APS Equivalent	1.5x: 18 - 36mm; 1.6x: 19.2 - 38.4mm	-
Type	Wide Zoom	Wide Zoom
Diaphragm Blades	6	7
Lens Construction	16 elements in 12 groups, including 3 aspherical and 4 SLD 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	35mm	Image Circle
Focal Length (mm)	12.00 - 24.00	7.00 - 14.00
Brand	Sigma	Olympus
Name	Sigma 12-24mm ƒ/4.5-5.6 EX DG Aspherical HSM	Olympus 7-14mm ƒ/2.8 Pro M.Zuiko Digital ED
Weight (g)	600	534
Diameter (mm)	87	78.9
Length (mm)	102.5	105.8
35mm Equivalent	-	14 - 28mm
Magnification Ratio (x)	0.14	0.11
Focus Details	Internal Focus; HSM with full-time manual override	-
Closest Focus (m)	0.28	0.2