Hi, i have a sigma 300 2.8 lens i used on my EOS 1N. I finally decided to go digital and have an EOS 10d, the lens just brings up Error on the 10d . Itook it back to Great Western Camera's who sold it to me and they sent it to Sigma, who told me it cannot be re-chipped, i have since been told by another camera shop some independant repairers can do the replacement ,if so have you any names and addresses. The lens is too good to mothball and a new lens is now out of my price range. Any help would be welcolm, Cheers Dave

SOURCE: sigma 70-300 dl macro lens

Yes it fits, but function, no, the electronics in the lens are not compatible with Canon digitals

SOURCE: Using old Sigma AF lenses with new DSLR Canon EOS

Hi Is the 28-70 a DF type if so it will work on a canon DSLR but if its the older one with the scale ring is on the outside of the lens it will need a rechip but I think thay are no longer avabile the 70-300 if is a super it will work or need a rechip if its a older one with a macro switch held on the lens with 2 screws it to old to up grade

SOURCE: sigma 70-300 error 99 on canon 20d &10d

If the macro switch is held on the lens by 2 screws it is to old and will on work on your camera but if yous is a super type it may need a rechip