The Kenko DGX PRO300 1.4X CF-AF Extender is made with precision quality multi-coated optical glass supplied by Hoya Corporation, the worldâ€™s largest manufacturer of optical glass. These glass elements are designed to match the optical quality of prime lenses (even at the edges) and telephoto zoom lenses. The optical design of the elements and light path is wide enough not to cause vignetting. The Kenko DGX Pro 300 converter has a genuine Gate Array IC (Integrated Circuitry). It means that the converterâ€™s own unique circuitry maintains signal integrity between the camera body and lens. These converters are designed to electronically operate the same way as an original manufacturerâ€™s converter. With the Kenko DGX Pro 300 1.4x, DGX full AF operation is possible with camera lenses having a maximum aperture of F4 or brighter. The same light and contrast requirements apply.
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