answersLogoWhite

0

Applied to focusing lenses and mirrors, including telescopes, binoculars, and cameras, the focal ratio or 'F-number' is (the focal length of the lens or mirror) divided by (its aperture or diameter)

User Avatar

Wiki User

15y ago

Still curious? Ask our experts.

Chat with our AI personalities

JudyJudy
Simplicity is my specialty.
Chat with Judy
EzraEzra
Faith is not about having all the answers, but learning to ask the right questions.
Chat with Ezra
CoachCoach
Success isn't just about winning—it's about vision, patience, and playing the long game.
Chat with Coach

Add your answer:

Earn +20 pts
Q: The F-ratio is a ratio of what?
Write your answer...
Submit
Still have questions?
magnify glass
imp