400mm f/2.8 L IS II + 2x Extender III

Started Nov 8, 2011 | Discussions thread
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Ray Chen
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400mm f/2.8 L IS II + 2x Extender III
Nov 8, 2011

I have been shooting a little with the two, so I thought I share a shot with the forum. Unlike my previous experience with the 200mm f/2L IS + 2x extender II, the 400mm + 2x III combo performs very well. The contrast is there, and its AF is fast. To test the AF performance, I shot a few frames during one of my football games. Unfortunately, the AF seems to be off in that very overcast afternoon even it was keeping up with the action very swiftly. I will play with it some more to eliminate operator error before I make any conclusive report on the AF.

Anyways, here is a 800mm f/5.6 shot from the zoo to share.

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