By rain-repellent, I don't mean waterproof. The camera is already waterproof.
What is mean is a camera lens design that will be more resistant to water drops gathering when riding.
The current (C5) design is a convex lens cover that appears to hold water between the lens cover and the outer housing. If the glass was flat against the outer housing - or even protruded a little past the housing - I am sure that rain would dissipate more easily.
Until then, I get rain drops that gather in the small recess between outer housing and lens cover.
Does my description make sense?
Sent from the rainy UK...