The Teleplus PRO 300 converters are made with prime quality multi-coated optical glass supplied via using Hoya Corporation.For instance, the use of a 2 occasions (2x) teleconverter will elevate the focal of 300mm lens to 600mm.. Kenko AF 1.5x Super High Quality Teleplus converter additionally has authentic Gated Array IC and that is compact for light weight and simple coping with. Full AF is ready with lenses having a most aperture of F/4.5 or brighter. (Manual focusing can be required with lenses of smaller aperture.)Placed between the digital camera physique and lens, a teleconverter includes a collection of optics in order to successfully elevate the focal length of a lens by implys of a particular amount. Common magnifications are 1.4 occasions and a pair of events, however the Kenko teleplus PRO 300 AF converter has a 3x magnification. For instance, the utilization of a 2 cases (2x) teleconverter will raise the focal of 300mm lens to 600mm. The Teleplus PRO 300 converters are made with top of the range multi-coated optical glass equipped by the use of Hoya Corporation, the worlds hugest producer of optical glass..Kenko 2.0X PRO 300 TeleconverterDG-Canon- EOS