Comparison of Sigma TC-1401 1.4X Teleconverter and Sony SAL-14TC 1.4X

Attribute	Sigma TC-1401 1.4X Teleconverter ×	Sony SAL-14TC 1.4X ×
Type	Teleconverter	Teleconverter
Name	Sigma TC-1401 1.4X Teleconverter	Sony SAL-14TC 1.4X
Weight (g)	190	170
Image Circle	35mm	35mm
Brand	Sigma	Sony
Magnification Ratio (x)	1.4	1.4
Lens Construction	7 elements in 5 groups, including 1 SLD element	5 elements in 4 groups
Notes	Dust and splash-proof; Available AF Mounts: Canon EF, Nikon F, Sigma SA	Compatible Lenses: Sony 70-200mm f/2.8 G, Sony 300mm f/2.8 G and Sony 135mm f/2.8 STF lenses
Diameter (mm)	69.8	64
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)	25	20