Comparison of Panasonic DMW-STC14 1.4X and Sigma TC-1401 1.4X Teleconverter

Attribute	Sigma TC-1401 1.4X Teleconverter ×	Panasonic DMW-STC14 1.4X ×
Type	Teleconverter	Teleconverter
Name	Sigma TC-1401 1.4X Teleconverter	Panasonic DMW-STC14 1.4X
Weight (g)	190	180
Image Circle	35mm	35mm (L-Mount)
Brand	Sigma	Panasonic
Magnification Ratio (x)	1.4	1.4
Lens Construction	7 elements in 5 groups, including 1 SLD element	7 elements in 4 groups, including 2 UHR (Ultra High Refractive Index) elements
Notes	Dust and splash-proof; Available AF Mounts: Canon EF, Nikon F, Sigma SA	Splash, Dust, and Freezeproof design; Compatible with select L-Mount lenses
Diameter (mm)	69.8	65.3
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	27.6