Canon announces 200-400mm f/4 telezoom with built-in 1.4x extender | Scoop Photography | Scoop.it
Canon has introduced the EF 200-400mm f/4L IS USM Extender 1.4x - a top-end telephoto zoom with a built-in switchable teleconverter, whose development was first announced back in February 2011.

Via Philippe Gassmann