Canon 1.4x EF Extender II (Teleconverter)

The Canon Extender EF 1.4x II is a teleconverter designed for use between compatible Canon EF mount lenses and Canon EOS camera bodies, increasing the effective focal length of the attached lens by a factor of 1.4x while reducing the maximum aperture by one stop. As the second-generation version of Canon’s 1.4x EF extender, it incorporates refined optical elements over the original version to help maintain image quality when used with compatible L-series and select other Canon EF lenses. Electronic contacts on both the lens and camera-facing mounts maintain full communication between the lens and body for autofocus, image stabilization, and EXIF data transmission with compatible lens and body combinations. The 1.4x multiplication factor provides a meaningful increase in reach with only a one-stop light loss, making it a practical option for photographers looking to extend telephoto reach while retaining autofocus performance on compatible lenses.

– 1.4x focal length multiplication factor
– One-stop reduction in maximum aperture
– Second-generation optical refinements over original version
– Full electronic communication for autofocus and image stabilization
– Maintains EXIF data transmission
– Compatible with Canon L-series and select EF mount lenses
– More light-efficient than 2x teleconverter options
– Canon EF mount compatibility