The Canon RF 16-28mm f/2.8 IS STM is a “never before seen” lens ... ring needs to first be twisted and ‘popped’ out to the 16mm mark before you can start shooting with the lens.

【新品上市】佳能 RF 16mm f/2.8 STM全画幅广角定焦镜头，仅售1519元！ 这款镜头采用了耐用的金属卡口设计，搭载哑光金属银色 ...

and inexpensive Canon RF 16mm f/2.8 STM at just $279 / £319 / AU$549. Canon RF 16-28mm f/2.8 IS STM: Design & Handling The first thing that grabbed my attention was just how small and lightweight ...