Canon Extender EF 1.4X III 1.4x Telephoto Extender

Telephoto Reach for Super Telephoto Lenses

The Canon Extender EF 1.4X III increases focal length by a factor of 1.4x for compatible Canon super telephoto lenses. It uses a construction of 7 elements in 3 groups to maintain optical quality. Professional photographers who need extra reach without changing lenses will find it useful. It is not for owners of standard zoom or wide-angle lenses that cannot accept an extender.

Optical Coatings and Communication

A built-in microcomputer enables communication between the camera body, lens and extender for accurate exposure and autofocus data. Careful lens placement and coatings minimise ghosting and flare in bright conditions. A Fluorine coating on the exterior surfaces resists soiling, smears and fingerprints during handling. The extender adds no extra accessories or software beyond its optical function.

Compact Mounting and Rugged Build

The extender measures 2.8 x 1.1 in (72.0 x 27.2 mm) and weighs 7.9 oz (225 g), so it adds minimal bulk to a super telephoto setup. Dustproof and water resistant construction protects the internals in harsh environments. Installation is a simple mount between the camera and lens, but autofocus speed may decrease slightly with the 1.4x magnification. Ensure your specific lens model is listed as compatible before purchase.