AFAIK, at least for Canon, to remove the aperture ring, was one of the steps toward a camera that can be commanded with just one hand (in fact canon cameras have the most-used commands on the right-most part of them). Canon is aiming at nature photographers (among others), those who may need a free hand to hang around in the wild . But of course other factors may have come in the math too (cost-cutting to say one).
> > Very true. However, the Canon EOS lenses does not have an aperture > ring, and neither does many nikon lenses. I don't know exactly why C > and N have eliminated them, but it could be a sign in time for the > future of the K-mount. >

