Originally posted by rawr (...)
Can't see any examples of something similar, except for the Sony 10-18 f4 on E-mount and the Sony 11-18 (variable aperture) on A mount...
There was a Tokina 11-16mm f/2.8 and there is a Tokina 11-20mm f/2.8.
---------- Post added 10-25-2017 at 02:31 PM ----------
Originally posted by Rondec Takes the place of the DA 12-24, I guess. I think that was a design that was licensed from Tokina.
Indeed, the smc Pentax-DA 12-24mm f/4's optical design was licensed from Tokina (and it was the only one; all other shared designs were Pentax designs licensed to Tokina).