詞語：f-number
f-number的解釋
f-number['efnʌmbə]n. 焦距比數
f-number的意思
f-number 光圈值;焦距比數;光圈數;光圈號數;
f-number的參考例句
1.Each F-number is known as a " F-stop ". 每個光圈值稱為一個「光圈檔」。
2.f-Number: A symbol that expresses the relative aperture of a lens. 制光圈（值）︰一個表示鏡頭的相對光圈的單位。
3.F-number: The figures marked on the lens collar to indicate the size of the lens aperture in relation to its focal length. 光圈值：刻劃在鏡頭上用來表示鏡頭孔徑與焦距關係的比值。