camera lens Plano convex lenses, Plano concave lenses,Bi-convex lenses,Bi-concave lenses, meniscus lenses. camera lensPlano convex lenses, Plano concave lenses ... ,Bi-convex lenses,Bi-concave lenses, meniscus lenses.Lens o Material: Bk7 ... length: 0.1% to 2%o Surface quantity: 80/50 to 20/10o Centration: 1 to 3Arc minutes.o Fringes ...