Comparison of Canon EF 100-300mm f/4.5-5.6 USM and Vivitar 100-400mm f/4.5-6.7 Series 1 AF

Attribute	Vivitar 100-400mm f/4.5-6.7 Series 1 AF ×	Canon EF 100-300mm f/4.5-5.6 USM ×
Filter Size (mm)	67	58
Aperture (f)	4.50 - 32.00	4.50 - 38.00
Closest Focus (m)	2	1.5
Magnification Ratio (x)	0.25	0.2
Type	Telephoto Zoom	Telephoto Zoom
Focus Details	AF/MF switch	Inner focusing; full-time manual focus and USM
APS Equivalent	1.5x: 150 - 600mm; 1.6x: 160 - 640mm	160 - 480mm
Diameter (mm)	74.2	73
Image Circle	35mm	35mm
Focal Length (mm)	100.00 - 400.00	100.00 - 300.00
Brand	Vivitar	Canon
Name	Vivitar 100-400mm f/4.5-6.7 Series 1 AF	Canon EF 100-300mm f/4.5-5.6 USM
Weight (g)	740	540
Diagonal Angle of View (degree)	6.40 - 24.00	8.30 - 24.00
Diaphragm Blades	-	8
Zoom System	Push-Pull	Rotary
Length (mm)	162	121
Notes	Available AF mounts: Canon, Minolta, Nikon, Pentax	-
Lens Construction	12 elements in 9 groups	13 elements in 10 groups