From the rumor site:
https://www.43rumors.com/rumor-and-...400mm-500mmm-panasonic-gx10-and-f-1-2-primes/
Olympus 500mm f/4.0 lens: Olympus confirmed they will make this lens and here is the patent.
Olympus 300-500mm f/2.8-4.0 lens: This lens has been patented but it’s unclear if they will really mass produce it.
Niels
https://www.43rumors.com/rumor-and-...400mm-500mmm-panasonic-gx10-and-f-1-2-primes/
Olympus 500mm f/4.0 lens: Olympus confirmed they will make this lens and here is the patent.
Olympus 300-500mm f/2.8-4.0 lens: This lens has been patented but it’s unclear if they will really mass produce it.
Niels