Reviews and Problems with Canon 200-400mm f/4 IS USM Extender 1.4x
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Used at Super Bowl, bravo Canon
4 September 2013
Summary: I am a professional photographer and just used this lens to shoot the Super Bowl in New Jersey, courtesy our local Canon rep. All I can say is wow. If it weren't for the out-of-reach price tag I would own this lens. For sports, it is almost perfect. It is fast, versatile and when a play is running into the end zone the ability to change focal length at a fixed aperture is amazing.