correct me if i'm wrong, but wasn't one of the criticisms of Canon, was them changing the lens mount about 15-20 years ago? That made all the older lenses obsolete, right?
If you talk about using lens in the manual way like nikon's older lenses...then all Canon old lenses still can be use and they are not obsolete. For 15-20 years canon has created more variety of lenses as compared to Nikon especially in the primes lenses. from 50F1.0 to 200F1.8, 35F1.4, 24F1.4, 85F1.2, 50F1.2, 14F2.8, I have many Nikon and even other brands users switch to Canon just because of these lens. Bokeh and low light photography with AF has never been sweeter. Others may argue that 3rd party has these lenses, but does it have AF capability?:dunno: