| Sigma 1.4x TC APO EX DGModerator: Moderators 
		
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		 Sigma 1.4x TC APO EX DGI recently used this TC with my Canon 70-200 F2.8 L lens while on holidays.  
 Image quality seems quite good with it fitted. I have not done a detailed study just yet but the quality seems not much worse than the 70-200 by itself. AF speed was quite good, with only a slight hint of hesitation now and then if the AF target contrast was poor (would not get this with the 70-200 by itself). Overall quite a good buy for around half the price of the genuine Canon item. Canon 20D and a bunch of lovely L glass and a 580EX. Benro tripod. Manfrotto monopod. Lowepro and Crumpler bags. And a pair of Sigma teleconverters, and some Kenko tubes. http://www.dionm.net/ 
 
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