Comparison of Sony SAL-20TC 2X and Sony SEL20TC 2X

Attribute	Sony SAL-20TC 2X ×	Sony SEL20TC 2X ×
Type	Teleconverter	Teleconverter
Name	Sony SAL-20TC 2X	Sony SEL20TC 2X
Weight (g)	200	207
Image Circle	35mm	35mm
Brand	Sony	Sony
Magnification Ratio (x)	2	2
Lens Construction	6 elements in 5 groups	8 elements in 5 groups, including 1 aspherical element
Notes	Compatible Lenses: Sony 70-200mm f/2.8 G, Sony 300mm f/2.8 G and Sony 135mm f/2.8 STF	For Sony E-mount; Compatible Lenses: Sony SEL70200GM and SEL100400GM lenses.
Diameter (mm)	64	62.4
Focal Length Multiplier	2X that of the master lens	2X that of the master lens
Effective Reduction in Aperture	2 f-stops	2 f-stops
Length (mm)	43.5	42.7