f-system

[ ef-sis-tuh m ]
/ ˈɛfˌsɪs təm /

noun Optics, Photography.

a system that indicates the relative aperture of a camera lens based on the f-number.

Words nearby f-system

f-bomb, f-factor, f-hole, f-number, f-stop, f-system, f-word, f., f. & t., f.a., f.a.a.a.s.