Comparison of Kenko Teleplus PRO 300 AF 3X and Sony SAL-20TC 2X

Attribute	Kenko Teleplus PRO 300 AF 3X ×	Sony SAL-20TC 2X ×
Type	Teleconverter	Teleconverter
Name	Kenko Teleplus PRO 300 AF 3X	Sony SAL-20TC 2X
Weight (g)	200	200
Image Circle	35mm	35mm
Brand	Kenko	Sony
Magnification Ratio (x)	3	2
Lens Construction	7 elements in 4 groups	6 elements in 5 groups
Notes	Available AF Mounts: Canon, Minolta, Nikon	Compatible Lenses: Sony 70-200mm f/2.8 G, Sony 300mm f/2.8 G and Sony 135mm f/2.8 STF
Diameter (mm)	68.3	64
Focal Length Multiplier	3X that of the master lens	2X that of the master lens
Effective Reduction in Aperture	3 f-stops	2 f-stops
Length (mm)	43.5	43.5