Comparison of Olympus EC-14 1.4X Zuiko Digital and Sigma TC-1401 1.4X Teleconverter

Attribute	Sigma TC-1401 1.4X Teleconverter ×	Olympus EC-14 1.4X Zuiko Digital ×
Notes	Dust and splash-proof; Available AF Mounts: Canon EF, Nikon F, Sigma SA	-
Weight (g)	190	170
Type	Teleconverter	Teleconverter
Brand	Sigma	Olympus
Name	Sigma TC-1401 1.4X Teleconverter	Olympus EC-14 1.4X Zuiko Digital
Lens Construction	7 elements in 5 groups, including 1 SLD element	6 elements in 5 groups
Image Circle	35mm	Four-thirds
Magnification Ratio (x)	1.4	1.4
Diameter (mm)	69.8	68
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	22