https://www.amazon.com/FOTOMIX-Fish-Eye-Olympus-Panasonic-Fisheye-m4/dp/B076TZ5PK9/ref=sr_1_2?keywords=m43+fisheye&qid=1561063931&s=gateway&sr=8-2
I almost got that one, but couldn't find a good deal on it. Then I also decided I wanted a slightly faster lens than f/8.