Comparison of Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX and Tokina 14-20mm f/2 AT-X 142 AF PRO DX SD

Attribute	Tokina 14-20mm f/2 AT-X 142 AF PRO DX SD ×	Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX ×
Filter Size (mm)	82	77
Notes	Available AF Mounts: Canon and Nikon Digital Only; Built-in AF motor for use with all Nikon DSLRs; Included Accessories: BH-823 Lens Hood	Weather sealed, freeze proof
Length (mm)	106	128
Magnification Ratio (x)	0.12	0.14
Diameter (mm)	89	87.6
Closest Focus (m)	0.28	0.28
Focal Length (mm)	14.00 - 20.00	10.00 - 25.00
Diagonal Angle of View (degree)	71.80 - 91.70	47.00 - 95.00
Brand	Tokina	Panasonic
Image Circle	APS-C	Micro Four-Thirds
Name	Tokina 14-20mm f/2 AT-X 142 AF PRO DX SD	Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX
Weight (g)	725	690
Type	Wide Zoom	Wide Zoom
Aperture (f)	2.00 - 22.00	1.70 - 16.00
Diaphragm Blades	9	9
Diaphragm Blades Type	-	circular
Lens Construction	13 elements in 11 groups, including 3 aspherical and 4 SD elements	17 elements in 12 groups, including 3 aspherical, 1 UHR and 4 ED elements
Zoom System	Rotary	Rotary
Focus Details	Internal with One-Touch Focus Clutch mechanism	Internal; Silent High-speed AF; AF/MF focus clutch
APS Equivalent	1.5x: 21 - 30mm; 1.6x: 22.4 - 32mm	-
35mm Equivalent	-	20 - 50mm