Canon Working on EF 200-400mm F/4L IS Lens With Built-In 1.4x Extender
It will operate as both a 200-400mm or a 280-560mm lens.
February 8, 2011
Canon has been known to announce the development of new lenses well before they hit the market and their latest tease comes in the form of a very interesting pro-super-telephoto lens. The EF 200-400mm f/4 IS USM extender looks a lot like the rest of Canon's beige pro lenses. But, it has an integrated 1.4x extender that can be turned on and off. That means it can be both a 200-400mm and 280-560mm lens in one body.
There aren't a ton of specifics in the press material, but they do claim that they've beefed up the weather-proofing even further with improved water- and dust-resistance. They do confirm that it will, predictably, incorporate fluorite elements.
They claim it's coming later this year, at which point we expect it to draw a decidedly pro-grade pricetag.