|Quoting LGW (Thread starter):|
I remember reading somewhere a while ago that some Sigma lenses need to be 'chipped' in order to fit onto and work correctly on some Canon DSLR's, 10D's if my memory serves me correctly.
I was wondering if anyone can confirm or deny this and if true is this the case with newer Canon DSLR's such as the 20D/350D?
As my entire lens set up is Sigma EX glass and when I come to upgrade it would be useful to know if I have to get this done.
|Quoting Tin67 (Reply 6):|
My understanding is that Sigma do not purchase a licence to produce EOS mounts from Canon, therefore are not privy to Canon's latest technology and likewise Canon are probably not going to go out of their way to gear their equipment to accept Sigma lenses. Newer bodies hold the information for older lenses within the camera, along with the configuration for any lenses that use the Canon mount under license. Apparently Sigma reverse engineer there lenses and on this basis without license they are not supported by the latest Canon technologies, hence the requirement to re-chip.
|Quoting UA777222 (Reply 8):|
Are you talking about the actual mount b/c I know that some lenses don't work with film bodies...