Doubles the focal length of a Canon EF lenses (2. 0x magnification Factor) (will not fit all EFS lenses Due to long rear element length)
Communication between lens & camera enables auto focus, auto iris & image stabilization
Lens construction Features 4 elements in 3 groups for sharp images
A maximum aperture of f/4 or greater is required in order to fully utilize the autofocus capabilities.
Limited 2-year Manufacturer

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