Comparison of Canon EF 100-300mm f/4.5-5.6 USM and Panasonic 100-300mm f/4-5.6 ASPH Mega O.I.S. Lumix G Vario

Attribute	Panasonic 100-300mm f/4-5.6 ASPH Mega O.I.S. Lumix G Vario ×	Canon EF 100-300mm f/4.5-5.6 USM ×
Diagonal Angle of View (degree)	4.10 - 12.00	8.30 - 24.00
Filter Size (mm)	67	58
Aperture (f)	4.00 - 22.00	4.50 - 38.00
Closest Focus (m)	1.5	1.5
Magnification Ratio (x)	0.21	0.2
Notes	Additional features: Mega O.I.S. Image Stabilization; Included accessories: lens hood, storage bag.	-
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	-	160 - 480mm
Diaphragm Blades	7	8
Image Circle	Micro Four-Thirds	35mm
Focal Length (mm)	100.00 - 300.00	100.00 - 300.00
Brand	Panasonic	Canon
Name	Panasonic 100-300mm f/4-5.6 ASPH Mega O.I.S. Lumix G Vario	Canon EF 100-300mm f/4.5-5.6 USM
Weight (g)	520	540
Zoom System	Rotary	Rotary
Length (mm)	126	121
Diameter (mm)	73.6	73
Focus Details	Internal focus with stepper motor	Inner focusing; full-time manual focus and USM
35mm Equivalent	200 - 600mm	-
Lens Construction	17 elements in 12 groups, including 1 ED element	13 elements in 10 groups