Comparison of Sony SAL-14TC 1.4X and Tamron F AF 1.4X

Attribute	Sony SAL-14TC 1.4X ×	Tamron F AF 1.4X ×
Type	Teleconverter	Teleconverter
Name	Sony SAL-14TC 1.4X	Tamron F AF 1.4X
Weight (g)	170	170
Image Circle	35mm	35mm
Brand	Sony	Tamron
Magnification Ratio (x)	1.4	1.4
Lens Construction	5 elements in 4 groups	4 elements in 4 groups
Notes	Compatible Lenses: Sony 70-200mm f/2.8 G, Sony 300mm f/2.8 G and Sony 135mm f/2.8 STF lenses	Available AF Mounts: Canon, Minolta, Nikon, Pentax
Diameter (mm)	64	66.5
Focal Length Multiplier	1.4X that of the master lens	1.4X that of the master lens
Effective Reduction in Aperture	1 f-stop	1 f-stop
Length (mm)	20	18.8