Cell phone lens structure 2p,3p,4p,5p what it means

p is the meaning of plastic, 2P refers to 2 plastic lenses, 3P 4P and so on; in addition, cell phone lens terminology will often mention G, refers to glass glass lens, 2P1G refers to 2 plastic lenses 1 glass lens, and so on. The more the number of pieces of G represents the better the effect of the lens, while the more expensive.