Kenko 1.4X Tele Extender / Converter Video Review For EF Mount
Sometimes you need a little more reach with a lens. I’ve even used this with a 50mm prime to get 75mm. This adapter unlike Canon’s will work with pretty much any lens, not just long tele glass. It also doesn’t suffer from a rear element that protrudes past the rear of the lens mount. Optically its on par with any of the big name lens extenders.