Comparison of Vivitar 2X Series 1 MC4 AF and Vivitar 2X Series 1 AF

Attribute	Vivitar 2X Series 1 MC4 AF ×	Vivitar 2X Series 1 AF ×
Weight (g)	240	240
Brand	Vivitar	Vivitar
Name	Vivitar 2X Series 1 MC4 AF	Vivitar 2X Series 1 AF
Lens Construction	4 elements; Multicoated Optical Glass	7 elements in 5 groups; Multicoated Optical Glass
Image Circle	35mm	35mm
Magnification Ratio (x)	2	2
Notes	Available AF Mounts: Canon FE, Nikon F, Sony Alpha	Available AF Mounts: Canon FE, Nikon F, Sony Alpha
Focal Length Multiplier	2X that of the master lens	2X that of the master lens
Effective Reduction in Aperture	2 f-stops	2 f-stops
Type	Teleconverter	Teleconverter