Canon Community

The Canon EF 70-300mm DO USM manual says it will not work with the EF 2X II extender.  Will it work (particularly the IS) with the newer EF 2X III extender? thanks Jerry

Are these fakes or knock offs.  I bought a 77mm Canon PL-C B lens --new for $35.  How can these be true Canon products?  The packaging and lens looks identical to the "real" deal I saw in a reputable camera store in Manhattan but that was selling for...