Comparison of Canon EF 70-200mm f/2.8L IS III USM and Canon EF 70-200mm f/2.8L IS USM

Attribute	Canon EF 70-200mm f/2.8L IS III USM ×	Canon EF 70-200mm f/2.8L IS USM ×
Notes	Image stabilization with up to 3.5 stops of correction (CIPA); Dust and moisture resistant.	Image Stabilization
Magnification Ratio (x)	0.21	0.16
Filter Size (mm)	77	77
Length (mm)	199	197
Closest Focus (m)	1.2	1.3
Diagonal Angle of View (degree)	12.00 - 34.00	12.00 - 34.00
Focus Details	Internal; Ultrasonic Motor (USM) with full-time manual focus; Focus limit switch	Inner focusing; full-time manual focus and USM
Focal Length (mm)	70.00 - 200.00	70.00 - 200.00
APS Equivalent	112 - 320mm	112 - 320mm
Brand	Canon	Canon
Image Circle	35mm	35mm
Name	Canon EF 70-200mm f/2.8L IS III USM	Canon EF 70-200mm f/2.8L IS USM
Weight (g)	1440	1470
Type	Telephoto Zoom	Telephoto Zoom
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	8	8
Diaphragm Blades Type	rounded	-
Lens Construction	23 elements in 19 groups, including 1 flourite element and 5 UD elements; Air Sphere coating; Fluorine coating	23 elements in 18 groups, including 4 UD elements
Zoom System	Rotary	Rotary
Diameter (mm)	88.8	86.2