topic Re: Does the 1.4 111 telephoto extender work with the EF 100-400 1:4.5-5.6 Lens on the Rebel T4i in EOS DSLR & Mirrorless Cameras https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111893#M71265 <P><EM>"Does the 1.4 111 telephoto extender work ..."</EM></P><P>&nbsp;</P><P><SPAN>It is not just this extender, no 1.4 extender will work.</SPAN></P> Tue, 26 Aug 2014 13:13:12 GMT ebiggs1 2014-08-26T13:13:12Z Does the 1.4 111 telephoto extender work with the EF 100-400 1:4.5-5.6 Lens on the Rebel T4i https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111741#M71259 <P>Does the 1.4 111 telephoto extender work with the EF 100-400 1:4.5-5.6 Lens on the Rebel T4i</P> Mon, 25 Aug 2014 20:52:12 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111741#M71259 EASYJOHN 2014-08-25T20:52:12Z Re: Does the 1.4 111 telephoto extender work with the EF 100-400 1:4.5-5.6 Lens on the Rebel T4i https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111763#M71261 <P>It will work in the sense that you will get a 1.4X magnification, but the Rebels won't autofocus since f/4.5*1.4 results in an effective aperure smallewr than f/5.6.</P><P>&nbsp;</P><P><IMG align="center" alt="T4i.JPG" border="0" title="T4i.JPG" src="https://community.usa.canon.com/t5/image/serverpage/image-id/5877i055722EA22285293/image-size/original?v=mpbl-1&amp;px=-1" /></P> Mon, 25 Aug 2014 22:13:36 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111763#M71261 jrhoffman75 2014-08-25T22:13:36Z Re: Does the 1.4 111 telephoto extender work with the EF 100-400 1:4.5-5.6 Lens on the Rebel T4i https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111771#M71263 <P>Hi jrhoffman75&nbsp;</P><P>Thank you for your help.</P> Mon, 25 Aug 2014 23:57:12 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111771#M71263 EASYJOHN 2014-08-25T23:57:12Z Re: Does the 1.4 111 telephoto extender work with the EF 100-400 1:4.5-5.6 Lens on the Rebel T4i https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111893#M71265 <P><EM>"Does the 1.4 111 telephoto extender work ..."</EM></P><P>&nbsp;</P><P><SPAN>It is not just this extender, no 1.4 extender will work.</SPAN></P> Tue, 26 Aug 2014 13:13:12 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Does-the-1-4-111-telephoto-extender-work-with-the-EF-100-400-1-4/m-p/111893#M71265 ebiggs1 2014-08-26T13:13:12Z