Comparison of Canon EF 400mm f/2.8L IS III USM and Sony SAL-300F28G 300mm f/2.8 G

Attribute	Canon EF 400mm f/2.8L IS III USM ×	Sony SAL-300F28G 300mm f/2.8 G ×
Magnification Ratio (x)	0.17	0.18
Filter Size (mm)	52	42
Focus Details	Inner focusing; full-time manual focus and Ring USM; Customizable Electronic Focusing Ring; 2 Focus Presets;	Internal; SSM (Super Sonic wave Motor) with Direct Manual Focus, Focus Hold button, Focus Range selector, Prefocus function
Closest Focus (m)	2.5	2
Lens Construction	17 elements in 13 groups, including 2 fluorite elements and one super UD element; Super Spectra Coating (SSC); Air Sphere Coating (ASC)	13 elements in 12 groups, including 3 ED elements
Length (mm)	343	242.5
Focal Length (mm)	400.00	300.00
Diaphragm Blades Type	circular	-
Brand	Canon	Sony
Image Circle	35mm	35mm
Name	Canon EF 400mm f/2.8L IS III USM	Sony SAL-300F28G 300mm f/2.8 G
Weight (g)	2840	2310
Type	Telephoto Prime	Telephoto Prime
Notes	Image Stabilization (up to 5-stops of correction); Dust- and water-resistant construction; Detachable, rotatable tripod collar.	Included Accessories: SH0012 Lens Hood
APS Equivalent	640mm	450mm
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	6.20	8.20
Diameter (mm)	163	122