As a 1.4x teleconverter, the focal length of the attached lens is magnified by a factor of 1.4x, with a 1 f/stop reduction in aperture rating, so a 70-200mm f/2.8 zoom effectively becomes roughly a ...
The Canon RF 70-200mm f2.8L IS USM is small, sharp, and steady. It’s almost perfect, but the incompatibility with teleconverters will put off some photographers. Why you can trust Space.com Our expert ...