f-szám

Etymology
The lowercase “f” stands for +.

Noun

 * 1)  f-stop any of the discrete steps for adjusting the aperture of a lens

Usage notes
Even though f-szám literally translates into f-number, a related concept, in Hungarian it is primarily used to mean f-stop, a value that can be set for each exposure. When referring to the maximum light-gathering ability of the lens (f-number), which is inherent and not adjustable, should be used instead. However, there is some confusion as to the correct use of these terms even among professionals, and in practice, they are often used interchangeably.