Comparison of Olympus 17mm f/1.2 Pro M.Zuiko Digital ED and Sigma 16mm f/1.4 DC DN Contemporary

Attribute	Sigma 16mm f/1.4 DC DN Contemporary ×	Olympus 17mm f/1.2 Pro M.Zuiko Digital ED ×
Diagonal Angle of View (degree)	83.20	65.00
Aperture (f)	1.40 - 16.00	1.20 - 16.00
Diaphragm Blades Type	rounded	circular
Filter Size (mm)	67	62
Notes	Lens mounts: Sony E-Mount, Micro Four-Thirds, Canon EF-M. Dust- and splash-proof design; Lens hood (LH716-01) included.	Dustproof and splashproof; Included Accessories: Lens Hood (LH-66C), Lens Cap (LC-62F), Lens Rear Cap (LR-2), Lens Case (LSC-0811).
Focus Details	Inner focusing with stepping motor	-
Type	Wide Prime	Wide Prime
Diaphragm Blades	9	9
Lens Construction	16 elements in 13 groups, including 3 FLD, 2 SLD and 2 aspherical elements	15 elements in 11 groups, including 1 Super ED, 1 ED-DSA, 1 EDA, 1 Super HR, 1 aspherical and 3 ED elements
Image Circle	APS-C	Image Circle
Focal Length (mm)	16.00	17.00
Brand	Sigma	Olympus
Name	Sigma 16mm f/1.4 DC DN Contemporary	Olympus 17mm f/1.2 Pro M.Zuiko Digital ED
Weight (g)	405	390
Diameter (mm)	72.2	68.2
Length (mm)	92.3	87
35mm Equivalent	-	34mm
Magnification Ratio (x)	0.1	0.15
APS Equivalent	1.5x: 24mm; 2.0x: 32mm	-
Closest Focus (m)	0.25	0.2