https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6843#M18535 it doesn't work at all nothing Mon, 10 Dec 2012 19:51:19 GMT patrickl 2012-12-10T19:51:19Z https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6839#M18534 Mon, 10 Dec 2012 19:19:48 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6839#M18534 Harry1114 2012-12-10T19:19:48Z https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6843#M18535 it doesn't work at all nothing Mon, 10 Dec 2012 19:51:19 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6843#M18535 patrickl 2012-12-10T19:51:19Z https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6853#M18536 <P>&nbsp;</P><P>Only aftermarket extenders from Sigma, Tamron, Kenco will work (manual focus) with the 70-300mm f4.5-5.6 DO.</P> Mon, 10 Dec 2012 21:38:53 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6853#M18536 David 2012-12-10T21:38:53Z https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6859#M18537 <P>I used a Kenko Pro 1.4 TC on mine and as already mentioned I had to focus manually.</P> Mon, 10 Dec 2012 22:05:57 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/Does-an-extender-work-with-the-DO-zoom-lenes/m-p/6859#M18537 cicopo 2012-12-10T22:05:57Z