[Klaus]

Now we are back to zero again ;-)

Yes, the Olympus is a faster lens but the Canon is a faster system. The lens alone is irrelevant.

Why would it be irrelevant? In that case any lens is irrelevant.

My point is that from a design and manufacturing POV it is an F/4 lens.

Kind regards, Wim

A lens alone serves no purpose. It is given a purpose by attaching it to a camera. 

Nobody has EVER denied the fact that this is a f/4 lens.

"Speed" comes from shutter speed and is there a shutter on those lenses?