What is the best Canon focusing screen Ee-A or Ee-S?
The Ee-A has less light loss, but is harder to focus than the Ee-S. The Ee-S is easier to focus because it has a special microlens pattern on it that makes the focusing much easier (Super Precision Focusing Screen) but its also a little bit darker than the Ee-A. Which one you choose depends on your needs and tastes. So there is no best focusing screen both are very good.
