Comparison of Olympus EC-14 1.4X Zuiko Digital and Tamron F AF 1.4X

Attribute	Olympus EC-14 1.4X Zuiko Digital ×	Tamron F AF 1.4X ×
Notes	-	Available AF Mounts: Canon, Minolta, Nikon, Pentax
Weight (g)	170	170
Type	Teleconverter	Teleconverter
Brand	Olympus	Tamron
Name	Olympus EC-14 1.4X Zuiko Digital	Tamron F AF 1.4X
Lens Construction	6 elements in 5 groups	4 elements in 4 groups
Image Circle	Four-thirds	35mm
Magnification Ratio (x)	1.4	1.4
Diameter (mm)	68	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)	22	18.8