Comparison of Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX and Tokina 20mm f/2 FE MF FiRIN

Attribute	Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX ×	Tokina 20mm f/2 FE MF FiRIN ×
Filter Size (mm)	77	62
Notes	Weather sealed, freeze proof	For Sony Full-frame E-Mount; Square bayonet type lens hood included.
Length (mm)	128	81.5
Magnification Ratio (x)	0.14	0.097
Diameter (mm)	87.6	69
Closest Focus (m)	0.28	0.28
Focal Length (mm)	10.00 - 25.00	20.00
Diagonal Angle of View (degree)	47.00 - 95.00	92.70
Brand	Panasonic	Tokina
Image Circle	Micro Four-Thirds	35mm
Name	Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX	Tokina 20mm f/2 FE MF FiRIN
Weight (g)	690	490
Type	Wide Zoom	Wide Prime
Aperture (f)	1.70 - 16.00	2.00 - 22.00
Diaphragm Blades	9	9
Diaphragm Blades Type	circular	-
Lens Construction	17 elements in 12 groups, including 3 aspherical, 1 UHR and 4 ED elements	13 elements in 11 groups, including 2 aspherical and 3 Super-Low Dispersion (SD) elements
Zoom System	Rotary	-
Focus Details	Internal; Silent High-speed AF; AF/MF focus clutch	Internal; Manual focus only
APS Equivalent	-	1.5x: 30mm
35mm Equivalent	20 - 50mm	-