The "lens cap" that comes with the 400 f/4 DO only works when the hood is attached. The lens as shipped is missing a push on lens cap that will fit the lens itself. The size looks to be about 120mm. Anybody know what lens cap would fit this lens and where to get it? I think the lens is the same size as the 300mm f/2.8.
You would think for $6000 Canon would include a lens cap!