First post. Experienced designer (UX), but new to type design.
Deceptively simple question: What corrections are needed to make a stressed/contrasted O look as geometrically circular as possible?
The O in most fonts look (to me) a little taller than the width, and when I have been playing with it, there seems to be a fine line between circular and superelliptical. I don't want to cross that line.
What should I be looking for? What effect does the axis have? Does the amount of contrast change the corrections required?