Has anyone heard of a plastic mount being used on a Canon lens? A co-worker of mine was browsing on the good-old web for a new camera deal and found a site I never heard of that offered a deal too good to be true. Something like $950 for a Canon 30D with the EF-S 17-85 f/4.5-5.6 IS USM lens kit. I informed her it had to be a scam since B&H and other more reputable sites had it at around $1400. She called up to order the kit anyway (bad idea) but informed that this kit had the plastic lens mount. She will have to "upgrade" to the metal mount if she wants. She did not place the order ( thank goodness). I only bring this up as this is not the first I heard of this plastic mounting though. I know Sigma or Tamron have metal coated plastic mounts on some of their lenses, but never heard of a Canon lens using it. Especially any of there newer ones.