#F153 (foam to fo'c'sle)
The Dictionary by Spencer Parks
Episode notes
I read from foam to fo'c'sle.
The formula for the f-number is actually very simple, but you'll probably never have to use it.
f-number = focal length / diameter of the aperture
I also can never remember how the focal length is measure on a lens, but the shorter ones are wide angle lenses and the longer ones are telephoto lenses.
https://en.wikipedia.org/wiki/F-number
https://en.wikipedia.org/wiki/Focal_length
The word of the episode is "focaccia".