The momentum of Chinese third-party manufacturers, who are fundamentally shifting the landscape of the affordable autofocus (AF) market, is becoming downright terrifying. Hot on the heels of 7Artisans’ flagship ‘135mm F1.8 MAX’ announcement, Sirui—a brand globally renowned for its premium tripods and anamorphic cinema optics—and Songraw—a rapidly rising star in the ultra-fast f/1.2 arena—have bo..