Comparison of Canon EF 300mm f/2.8L IS USM and Sony 300mm f/2.8 G SSM II SAL300F28G2

Attribute	Canon EF 300mm f/2.8L IS USM ×	Sony 300mm f/2.8 G SSM II SAL300F28G2 ×
Filter Size (mm)	52	42
Notes	Image Stabilization; Magnesium alloy lens barrels	Thanks to a new LSI drive circuit, the SAL-300F28GII offers faster, more accurate autofocusing with four times faster object tracking performance tha
Closest Focus (m)	2.5	2
Magnification Ratio (x)	0.13	0.18
Type	Telephoto Prime	Telephoto Prime
Focus Details	Inner focusing; full-time manual focus and USM	Internal; SSM (Super Sonic wave Motor) with Direct Manual Focus (2 modes), Focus Hold button, Focus Range selector, Prefocus function
APS Equivalent	480mm	450mm
Diameter (mm)	128	122
Image Circle	35mm	35mm
Focal Length (mm)	300.00	300.00
Brand	Canon	Sony
Name	Canon EF 300mm f/2.8L IS USM	Sony 300mm f/2.8 G SSM II SAL300F28G2
Weight (g)	2550	2340
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	8	9
Diagonal Angle of View (degree)	8.30	8.20
Length (mm)	252	242.5
Diaphragm Blades Type	-	rounded
Lens Construction	17 elements in 13 groups, including 1 flourite and 2 UD elements	13 elements in 12 groups, including 3 ED elements