Overview

The Canon Extender EF 1.4x II is a solidly built, weather-sealed teleconverter that multiplies focal length by 1.4x while reducing aperture by one stop. Optically, it introduces a modest reduction in sharpness, especially in corners, and increases chromatic aberration, but vignetting is reduced. Autofocus speed is reduced, and compatibility is limited to L-series and select lenses. It suits photographers seeking affordable reach with high-quality lenses, particularly for telephoto and macro work.