Comparison of Olympus 25mm ƒ/1.8 M.Zuiko Digital and Sigma 19mm F2.8 EX DN

Attribute	Sigma 19mm F2.8 EX DN ×	Olympus 25mm ƒ/1.8 M.Zuiko Digital ×
Diagonal Angle of View (degree)	59.30	47.00
Aperture (f)	2.80 - 22.00	1.80 - 22.00
Diaphragm Blades Type	rounded	circular
Filter Size (mm)	46	46
Notes	Lens mounts: Sony E-Mount, Micro Four Thirds. Sigma's Super Multi-Layer Coating.	Available in black or silver. Included accessories: Lens Cap (LC-46), Lens Rear Cap (LR-2), Lens Hood (LH-49B), Decoration Ring (DR-49).
Focus Details	Inner focusing with linear AF motor	-
Type	Wide Prime	Standard Prime
Diaphragm Blades	7	7
Lens Construction	8 elements in 6 groups, including 3 aspherical elements	9 elements in 7 groups, including 2 aspherical elements
Image Circle	APS-C	Image Circle
Focal Length (mm)	19.00	25.00
Brand	Sigma	Olympus
Name	Sigma 19mm F2.8 EX DN	Olympus 25mm ƒ/1.8 M.Zuiko Digital
Weight (g)	140	136
Diameter (mm)	60.6	56
Length (mm)	45.7	41
35mm Equivalent	-	50mm
Magnification Ratio (x)	0.14	0.12
APS Equivalent	1.5x: 28.5mm; 2.0x: 38mm	-
Closest Focus (m)	0.2	0.24