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BetterPhoto Q&A
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 Rob Warwick 
robdoc75.com member since: 4/27/2009 |
Teleconverters Is a teleconverter (e.g., 1.4x or 2x) compatible with a Canon EF 70-300 1/4.5-5.6 lens? I know I won't be able to use AF, but will work with MF? Thanks, Rob 1/25/2010 12:46:14 PM |
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Gregory LaGrange
gregorylagrange.org member since: 11/11/2003 |
It's not compatible with that zoom lens. It's compatible with the 70-200L f/2.8 and the 100-400L f/4.5-5.6 and the L series fixed telephotos of 135mm and above. You can use autofocus as long as the lens that you put it on has a max aperture of at least f/4 with the 2x extender. Manual focus will work as long as you can turn the focusing ring. 1/25/2010 1:25:49 PM |
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Jon Close member since: 5/18/2000 |
Canon's and Sigma's teleconverters will not fit that lens. Their TCs have an extended front element that nests into the rear of a select few compatible lenses. Kenko and Tamron make teleconverters that will fit and do work with the EF 70-300. AF will be unreliable if it works at all, and the viewfinder gets dim which hinders manual focus, but it can be done. 1/25/2010 2:49:28 PM |
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Rob Warwick
robdoc75.com member since: 4/27/2009 |
Thank you all for your advice. Product descriptions many times don't tell you these things. Regards, Rob 1/25/2010 6:18:48 PM |
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