----- Original Message ----- From: "Godfrey DiGiorgi" <[EMAIL PROTECTED]>
> > On Jul 10, 2005, at 11:44 AM, Christian wrote: > > > I think this is more of a problem with Canon. > > I find it very hard to direct the blame for Sigma malfunctions to Canon. > > - All Canon brand EOS lenses work flawlessly on all EOS bodies, > regardless of their age. Of course they do. My statement was not that Canon are incompatible with Sigma, but that *older* sigmas (like my much loved 300/4 APO macro) are incompatible with Canon. The "blame" if you want to call it thay lies squarely with Sigma. > > - Sigma does not license the EOS mount specification and reverse > engineers it instead, ostensibly to save money. Which is what I was referring to when I mentioned it in my previous message. I said I had read a few forums and eBay auctions mentioning the need for Sigma to "re-chip" whatever that means, older lenses to work on DSLRs. > > - Sigma's quality control is extremely variable, evidenced by my own > personal experience and by the experience of a major and well > respected dealer in my neighborhood. The fact that Canon's lenses > work on all Canon bodies, regardless of age, generally indicates a > high quality acceptance testing program, which is exactly what Sigma > cuts corners on to offer low prices. And it's why I will not use third party lenses anymore, and will be sticking to "L" lenses wherever possible. > > - Problems have been experienced by more than just Canon users with > Sigma lenses. I had problems with them on Minolta and Nikon bodies. I > was already disgusted with them before I owned Canon EOS gear. Again, I only mentioned anecdotal evidence from *my* experience in reading a few forums and auctions about Canon. I don't really care about Nikon or Minolta compatability. My *relavent-to-this-list* counterpoint was that ALL Sigma k-mount lenses work on ALL Pentax k-mount bodies based on my experience. Christian
