The KENKO 1,4x Teleplus Pro 300 DGX Konverter for Canon AF extending the Focal lenght for Canon Lenses by 1,4x
KENKO 1,4x Teleplus Pro 300 DGX converters are made with precision quality multi-coated optical glass supplied by Hoya Corporation, the worlds largest manufacturer of optical glass. These glass elements were designed to match the optical quality of the prime lens (even at the edges) and telephoto zoom lenses. The optical design of the elements and light path is wide enough not to cause vignetting. KENKO 1,4x Teleplus Pro 300 DGX converters have genuine Gate Array IC (Integrated Circuitry). It means that the converter's own unique circuitry maintains signal integrity between the camera body and lens.
I use the Kenko converter in conjunction with the telephoto lenses in the twilight in the early morning or at dusk. The Kenko 1.4 x Converter has less light loss compared to the Canon, this means’ 1 F-stop is more light when taking pictures available. Since the Kenko in Figure performance converter in nothing after the Canon the Kenko in these situations provides the better light in connection with the f4 telephoto lenses for me.
These converters are designed to electronically operate the same way as an original manufacturer's converter. With the 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. The DGX Teleplus converters have updated circuitry to record exif data more accurately. In the exif exposure data (meta-data recorded with a digital picture) DGX converters record the equivalent aperture and focal length of the lens setting plus tele-converter. Optically and mechanically they are the identical to the prior high-quality DG series converters.