Makes sense, Swifty.

Tokina and Pentax have been co-designing and cross-badging (and for all I know cross-dressing) for years. They both used to be owned by the same parent company. (Maybe they still are.) My much-loved little Tokina 10-17mm fisheye zoom is apparently a re-work of a long-forgotten Pentax film lens, and my old 35mm Tokina macro was certainly sold under both brands.