Canon EF 200-400mm lens instance of lens model
The EF 200–400 mm f/4L IS USM Extender 1.4× is an EF mount super telephoto zoom lens produced by Canon. It is part of the professional L-series and functions with the Canon EOS line of cameras. The EF 200–400 mm lens features an ultrasonic motor, image stabilization and weather sealing. It is the first and only EF lens with a built-in extender.History
The EF 200–400 mm f/4L was first announced to be in development in February 2011 and a prototype was showcased at the 2011 CP+ tradeshow. In November 2011, Canon announced that availability of the lens would be postponed to an unspecified later date. The lens was only released more than a year later in May 2013.
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