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 apertureI 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-numberhttps://en.wikipedia.org/wiki/Focal_length  The word of the episode is "focaccia".https://en.wikipedia.org/wiki/Focaccia  Use my special link https://zen.ai/thedictionary to save 30% off your first month of any Zencastr paid plan.   Create your podcast today! #madeonzencastr  Theme music from Jonah Krauthttps://jonahkraut.bandcamp.com/  Merchandising!https://www.teepublic.com/user/spejampar  "The Dictionary - Letter A" on YouTube "The Dictionary - Letter B" on YouTube "The Dictionary - Letter C" on YouTube "The Dictionary - Letter D" on YouTube "The Dictionary - Letter E" on YouTube "The Dictionary - Letter F" on YouTube  Featured in a Top 10 Dictionary Podcasts list!https://blog.feedspot.com/dictionary_podcasts/  Backwards Talking on YouTube:https://www.youtube.com/playlist?list=PLmIujMwEDbgZUexyR90jaTEEVmAYcCzuq  https://linktr.ee/spejampar [email protected]https://www.facebook.com/thedictionarypod/https://www.threads.net/@dictionarypodhttps://twitter.com/dictionarypodhttps://www.instagram.com/dictionarypod/https://www.patreon.com/spejamparhttps://www.tiktok.com/@spejampar917-727-5757