Apassage of music is marked "ritardando." the following passage is marked "a tempo." the composer is instructing the players to a. gradually slow down until the end of the piece. b. slow down and then return to the original speed. c. speed up and and then come to an abrupt stop. d. speed up and then return to the original speed.

like any other technology, art form or field, digital cameras have their own nomenclature. the alphabet soup of jargon can be as confusing and intimidating as trying to understand how all those dials, buttons, levers and menu options affect the pictures and videos that you capture. fear not, because we've defined the most important words, phrases, commands and options you'll need to know when shopping for and learning to operate your new dslr, mirrorless, smartphone or other camera.