The Canon EF 100-400 f/4.5-5.6L IS Successor is rumored to arrive at Photokina / 16-21 Spetember 2014, Canon 7D Mark II is also rumored on same month..
The upcoming successor will sure feature improved optics and optical image stabilization up to 4 stops, the lens will not feature push-pull tech and rumored to be more pricey than its predecessor.
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