Comparison of Konica Minolta AF Apo (D) 1.4X and Sigma TC-1401 1.4X Teleconverter

Attribute	Sigma TC-1401 1.4X Teleconverter ×	Konica Minolta AF Apo (D) 1.4X ×
Notes	Dust and splash-proof; Available AF Mounts: Canon EF, Nikon F, Sigma SA	-
Weight (g)	190	170
Type	Teleconverter	Teleconverter
Brand	Sigma	Konica-minolta
Name	Sigma TC-1401 1.4X Teleconverter	Konica Minolta AF Apo (D) 1.4X
Lens Construction	7 elements in 5 groups, including 1 SLD element	5 elements in 4 groups
Image Circle	35mm	35mm
Magnification Ratio (x)	1.4	1.4
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