Kenko has introduced updated versions of its Teleplus teleconverters for lenses in the Canon EOS EF and EF-S fits with new circuitry that allows EXIF data from the lens in use to be recorded by the body. The Teleplus 2.0x HD DGX and 1.4x HD DGX converters use Hoya glass and offer full autofocusing facilities when matched with lenses with a wide enough maximum aperture. Read more
Articles: Digital Photography Review (dpreview.com)