Impeccable! 121 312 3242

The 2x teleconverter III is a great complement to the Canon L series telephoto lenses The sharpness remains excellent as well as the overall quality of the images.
Good to know: the teleconverter lose some focal lengths the lens when it is installed. An f / 2.8 becomes an f / 4.5-5.6 depending on the focal length. Also, if the lens used is already an f / 4 or more, autofocus is only possible with the EOS 1D ... For other boxes, you must switch to manual focus.