Originally posted by repaap I would be very surprised if it was not Tokina rebadge
While it's possible the DFA 70-200/4 could be based on a Tokina design, it won't technically be a rebadge. It will have Pentax HD coatings and it will likely be assembled and produced by Pentax. Technically speaking, even the DFA 15-30 and the DFA 24-70 aren't complete rebadges. A 100% rebadge would be a lens identical to the Tamron lenses except with Pentax labels. The inclusion of HD coatings makes these lens, however, only partial rebadges.
If I had to bet, I'd say this new DFA 70-200/4 is a Pentax design. There's been rumors for years that Pentax was working on an f4 telephoto zoom. Furthermore, there's at least four, possibly five lens design teams at Pentax. Between 2015 and 2016 Pentax released five in-house designed lenses: the DA 18-50, the DA 55-300 PLM, the DFA 28-105, the DFA 150-450, the DFA* 70-200. Those five lenses could not all have been designed and brought to production by the same one or two teams. So the very fact we've gone several years without any new lens releases suggests that these lens design and production teams have been working on in-house designs and that explains why it's taking so long. If Pentax was really into doing "rebadges" and using lens designs of other companies, we'd see a lot more DFA lenses. They only went with Tamron "rebadges" out of dire necessity, not because they really wanted to.