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Message: <blockquote data-quote="Jaff" data-source="post: 1355677" data-attributes="member: 42340">I can give you the benefit of personal expeience here (well sort of). My dad had the 70-300mm before he got his 100-400mm and whenever he, myself and my brother Paul would all go out he'd always borrow Paul's 70-200mm (the IS model) using his own Kenko 1.4x. The 70-200mm with 1.4x TC still had a better IQ than the 70-300mm and was a bit faster too if I remember right. Not to mention with the 70-200mm you have a stellar lens without the TC capable of doing a little bit of macro work an all.Regards. :t:Jaff</blockquote>