Comparison of Fujinon XF 16mm f/2.8 R WR and Sigma 19mm F2.8 EX DN

Attribute	Sigma 19mm F2.8 EX DN ×	Fujinon XF 16mm f/2.8 R WR ×
Filter Size (mm)	46	49
Notes	Lens mounts: Sony E-Mount, Micro Four Thirds. Sigma's Super Multi-Layer Coating.	For Fujifilm X-mount; Weather and Dust Resistant; Lens hood included.
Closest Focus (m)	0.2	0.17
Magnification Ratio (x)	0.14	0.13
Type	Wide Prime	Wide Prime
Length (mm)	45.7	45.4
APS Equivalent	1.5x: 28.5mm; 2.0x: 38mm	24mm
Diagonal Angle of View (degree)	59.30	83.20
Image Circle	APS-C	APS-C (Fujifilm X-mount)
Focal Length (mm)	19.00	16.00
Brand	Sigma	Fujinon
Name	Sigma 19mm F2.8 EX DN	Fujinon XF 16mm f/2.8 R WR
Weight (g)	140	155
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	7	9
Diaphragm Blades Type	rounded	rounded
Lens Construction	8 elements in 6 groups, including 3 aspherical elements	10 elements in 8 groups, including 2 aspherical elements
Diameter (mm)	60.6	60
Focus Details	Inner focusing with linear AF motor	Inner focusing system with stepper motor