Comparison of Canon EF 70-300mm ƒ/4-5.6L IS USM and Canon EF 100-400mm f/4.5-5.6L IS USM

Attribute	Canon EF 100-400mm f/4.5-5.6L IS USM ×	Canon EF 70-300mm ƒ/4-5.6L IS USM ×
Notes	Image Stabilization	Image Stabilization (4-stops). Included Accessories: Lens hood, soft case. Tripod mount optional.
Magnification Ratio (x)	0.2	0.21
Filter Size (mm)	77	67
Length (mm)	189	143
Closest Focus (m)	1.8	1.2
Diagonal Angle of View (degree)	6.20 - 24.00	8.30 - 34.00
Focus Details	Inner focusing; full-time manual focus and USM	Ultra-sonic Motor (USM) with AF/MF switch
Focal Length (mm)	100.00 - 400.00	70.00 - 300.00
APS Equivalent	160 - 640mm	112 - 480mm
Brand	Canon	Canon
Image Circle	35mm	35mm
Name	Canon EF 100-400mm f/4.5-5.6L IS USM	Canon EF 70-300mm ƒ/4-5.6L IS USM
Weight (g)	1380	1050
Type	Telephoto Zoom	Telephoto Zoom
Aperture (f)	4.50 - 40.00	4.00 - 45.00
Diaphragm Blades	8	8
Diaphragm Blades Type	-	rounded
Lens Construction	17 elements in 14 groups, including 1 flourite and 1 Super UD element	19 elements in 4 groups, including 2 UD elements
Zoom System	Push-pull	Rotary
Diameter (mm)	92	89