Overview

The Kenko Teleplus Pro 300 AF 3.0x is a 3x teleconverter that increases focal length but causes a 3-stop light loss, making autofocus unreliable except with f/2.8 or faster lenses in good light; manual focus is often recommended. It uses Hoya multicoated optics and maintains electronic communication via Gate Array IC. Build quality is solid, but the converter is best suited for telephoto lenses 100-500mm, not wide-angle zooms. It appeals to users seeking extreme reach with fast primes like the 200mm f/2.8, though image quality may degrade.