Comparison of Vivitar 1.4X Series 1 AF and Vivitar 2X Series 1 AF

Attribute	Vivitar 2X Series 1 AF ×	Vivitar 1.4X Series 1 AF ×
Weight (g)	240	181
Brand	Vivitar	Vivitar
Name	Vivitar 2X Series 1 AF	Vivitar 1.4X Series 1 AF
Lens Construction	7 elements in 5 groups; Multicoated Optical Glass	4 elements in 4 groups; Multicoated Optical Glass
Image Circle	35mm	35mm
Magnification Ratio (x)	2	1.4
Notes	Available AF Mounts: Canon FE, Nikon F, Sony Alpha	Available AF Mounts: Canon EF, Nikon F, Sony Alpha
Focal Length Multiplier	2X that of the master lens	1.4X that of the master lens
Effective Reduction in Aperture	2 f-stops	1 f-stop
Type	Teleconverter	Teleconverter