Tamron 2X TC-X20

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Lens Specifications
Name Tamron 2X TC-X20
Image Circle 35mm
Type Teleconverter
Focal Length Multiplier 2X that of the master lens
Effective Reduction in Aperture 2 f-stops
Lens Construction 9 elements in 5 groups, including 1 Low Dispersion element
Closest Focus Same as that of master lens
Magnification Ratio 2X that of master lens
Dimensions(Length x Diameter) 53.6mm x 69.8mm / 2.11 in. x 2.75 in.
Weight 360g / 12.7 oz
Notes Available AF Mounts: Canon EF, Nikon F; Included Accessories: Mount cap, Rear cap, Lens case
Typical Online Price US$440