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Canon Extenders II vs III

Started Jun 13, 2011 | Discussions thread
John Sheehy Forum Pro • Posts: 26,698
Re: Canon Extenders II vs III

Victor Engel wrote:

I've not used them. However, according to the new item:
http://www.dpreview.com/news/1008/10082611canonef14xiiief2xiii.asp

they have new optics and new processors for improved lens/camera communications.

The new level of communication is only taken advantage of by the 1Dx and 1DxII, from what I've heard. Of course, any optical improvements work automatically with all cameras.

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