http://www.sigmaphoto.com/html/pages/faqsb.htm#15
http://www.sigmaphoto.com/html/news/80-400os.htm I very much doubt they got any help from Canon (probably why they couldn't call it USM & IS)... I have heard that it HSM is not quite 100% as good as Canon/Nikon, which again suggests it is their own design, but it 99% there. Nobody knows how good OS is yet, although Nikon VR is supposedly nowhere near as good as Canon IS, so I guess this is a difficult thing to get right. This also points that Nikon did their own thing for IS, rather than copy canon... > -----Original Message----- > From: Mike Johnston [mailto:[EMAIL PROTECTED]] > Sent: 13 February 2003 01:32 > To: [EMAIL PROTECTED] > Subject: Re: End of K-mount? > > > > With all due respect, Sigma has HSM and now OS. Maybe you > cant do a > > carbon copy of Canon, but no reason why you cant do your own. If > > Sigma can do it then damn sure Pentax can! > > > Rob, > You may be right. (I wasn't even aware of "HSM and OS.") On > the other hand, maybe Canon is willing to license to Sigma > but not to Pentax. I dunno. > > --Mike > >
