https://community.usa.canon.com/t5/EF-RF-Lenses/400mm-F-2-8-teardown-at-Lens-rentals/m-p/261996#M11872 <P>Since the last link did *not* get excised:</P><P><A href="https://www.lensrentals.com/blog/2018/12/the-great-400mm-f2-8-teardown-competition-part-1-the-canon-400mm-f2-8-l-is-iii/" target="_blank">https://www.lensrentals.com/blog/2018/12/the-great-400mm-f2-8-teardown-competition-part-1-the-canon-400mm-f2-8-l-is-iii/</A></P><P>&nbsp;</P><P>It uses the same focus motor as the R-Series 50mm / 1.2!</P> Tue, 18 Dec 2018 22:21:43 GMT kvbarkley 2018-12-18T22:21:43Z https://community.usa.canon.com/t5/EF-RF-Lenses/400mm-F-2-8-teardown-at-Lens-rentals/m-p/261996#M11872 <P>Since the last link did *not* get excised:</P><P><A href="https://www.lensrentals.com/blog/2018/12/the-great-400mm-f2-8-teardown-competition-part-1-the-canon-400mm-f2-8-l-is-iii/" target="_blank">https://www.lensrentals.com/blog/2018/12/the-great-400mm-f2-8-teardown-competition-part-1-the-canon-400mm-f2-8-l-is-iii/</A></P><P>&nbsp;</P><P>It uses the same focus motor as the R-Series 50mm / 1.2!</P> Tue, 18 Dec 2018 22:21:43 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/400mm-F-2-8-teardown-at-Lens-rentals/m-p/261996#M11872 kvbarkley 2018-12-18T22:21:43Z https://community.usa.canon.com/t5/EF-RF-Lenses/400mm-F-2-8-teardown-at-Lens-rentals/m-p/262002#M11873 <P>Thanks. Passing the link onto a friend who has one on pre order that shipped today.</P> Wed, 19 Dec 2018 00:16:39 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/400mm-F-2-8-teardown-at-Lens-rentals/m-p/262002#M11873 cicopo 2018-12-19T00:16:39Z