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      07-11-2011, 04:44 PM   #28
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Drives: 2006 BMW 330i ZPP, ZSP
Join Date: Dec 2008
Location: Minneapolis, MN

Posts: 6,792
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Originally Posted by UdubBadger View Post
Yeah I figured if I'm gonna get the 2x converter for my 70-200 f4 is at home. But it would also be fun to have the 100-400 and be able to make it a 200-800. The 2x converter makes it an f/5.6 when used anyway. I would probably like to upgrade my 70-200 to the 2.8 IS first though. Such a baller lens, despite the weight.
Keep in mind that you lose AF if you put the 2x TC on the f/4, unless you have a 1-series body. The 2x converter adds 2-stops, so you won't get a f/5.6 unless you have a f/2.8 to begin with.

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