The 5D Mark III now autofocuses with the 2X!
The photograph below is a Sally Lightfoot Crab. YES! The new firmware update arrived for the Canon 5D Mark III. The main improvement is now the possibility of autofocusing at f/8 instead of f/5.6 only. This means that a lens with a maximum aperture of f/4 can now be combined with the 2X teleconverter and