Taking a closer look at the new Canon RF 400mm F2.8 and 600mm F4L I.S.

Canon has announced two new telephoto prime lenses for the RF mount. The RF 400mm F2.8L IS USM and 600mm F4L IS USM have the same optical makeup as their EF-mount equivalents, which were released relatively recently, in late 2018.

Click through for a closer look at these two new telephoto options for RF.