Comparison of Canon EF 16-35mm f/2.8L III USM and Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX

Attribute	Canon EF 16-35mm f/2.8L III USM ×	Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX ×
Filter Size (mm)	82	77
Notes	Image stabilization; dust and moisture resistant	Weather sealed, freeze proof
Closest Focus (m)	0.28	0.28
Magnification Ratio (x)	0.22	0.14
Diameter (mm)	88.5	87.6
Type	Wide Zoom	Wide Zoom
APS Equivalent	26 - 56mm	-
Diagonal Angle of View (degree)	63.00 - 108.20	47.00 - 95.00
Image Circle	35mm	Micro Four-Thirds
Focal Length (mm)	16.00 - 35.00	10.00 - 25.00
Brand	Canon	Panasonic
Name	Canon EF 16-35mm f/2.8L III USM	Panasonic 10-25mm f/1.7 ASPH LEICA DG VARIO-SUMMILUX
Weight (g)	790	690
Aperture (f)	2.80 - 22.00	1.70 - 16.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	circular
Lens Construction	16 elements in 11 groups, including 2 large-diameter double-surface GMo (glass-molded) elements, a ground aspherical element, and 2 UD elements	17 elements in 12 groups, including 3 aspherical, 1 UHR and 4 ED elements
Zoom System	Rotary	Rotary
Length (mm)	127.5	128
35mm Equivalent	-	20 - 50mm
Focus Details	Inner focusing; AF with USM, full-time manual focus	Internal; Silent High-speed AF; AF/MF focus clutch