PMA: New Canon 70-200 f2.8 IS USM II?

Started Jan 27, 2008 | Discussions thread
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Re: Then Canon L is more reliable than God himself
In reply to genotypewriter, Apr 3, 2008

You're right, there is 1 fluorite element in the f4 version, and two UD elements, while the f2.8 has 4 UD elements:

I read somewhere that 2 UD elements are roughly equivalent to 1 fluorite element, so I guess we're still even, though.

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