Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
The ratio of the focal length of a camera lens to the diameter of the aperture being used for a particular shot (e.g., f8, indicating that the focal length is eight times the diameter)→ F
- ‘All these f-numbers, focal lengths, film speeds and apertures are actually really simple to get to grips with once you understand how they relate to each other and to the finished picture.’
- ‘The f-numbers marked on a lens are only truly accurate when the lens is focused at infinity.’
- ‘So if you want to have that window frame, the couple, and the envelope all in focus, you need a narrow aperture, and so a large f-number, such as f22.’
- ‘The configuration offers the advantage of high image quality, low distortion, and low f-number, making it ideal for spectral imaging.’
- ‘The higher f-numbers mean the diameter of the lens can be smaller, so the lens, using only 20% to 25% as much material, will cost less and weigh less.’
Early 20th century: from f (denoting the focal length) and number.
Are you looking for a word for a foolish person? We explore twelve interesting words to describe the dunderheads in your life.
Before you run for the hills, let’s run through a list of ‘run’ expressions that are running through our minds.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.