攝係比轉更寬泛一級嘅韻母分類。分類原則與「轉」相似，要求韻尾相同（或發音部位一致——指同攝入聲），韻腹發音相近，而對四聲、開合口、介音就不作區別。「攝」有統攝嘅意思，即將相近的韻歸納喺一起。宋、元之間等韻學家，對《廣韻》韻目按以上原則歸納爲十六類，即十六攝。攝即係從十六攝中抽象出來的概念，一般，音韻學中提到某一攝，指嘅就係十六攝中的某一類。
Shoot is a broader level of finals classification than turn. The classification principle is similar to that of "turn", which requires that the rhyme is the same at the end (or the pronunciation part is the same - finger and ingestion sound), and the pronunciation of the rhyme is similar, but there is no distinction between the four tones, opening and closing, and the middle sound. "Take" has the meaning of unification, that is, to summarize similar rhymes. Rhyme scholars between the Song and Yuan dynasties summarized the rhymes of "Guangyun" into sixteen categories according to the above principles, that is, sixteen shots. Photography is an abstract concept from the sixteen photographs, and in general, when a certain photography is mentioned in phonology, it refers to a certain category of the sixteen photographs.