I've been off and on this site for awhile and am planning to beef up my lens collection. I'm got canon gear now w/ the purchase of a 60d, but a recent search has left me confused. Older threads seem to recommend buying a NIKON mount lens and using an eos adaptor for the canon body. Newer threads do not make this distinction. Since I've been away for awhile, can someone please enlighten me--for video use, which is preferable? Has there been a shift in techniques or a trick to make native eos lenses easier to pull focus? Thanks, in advance.