1, refractive index. Wanxin lens has a low refractive index, ranging from 1.49 to 1.74, and Kodak lens ranges from 1.523 to 1.9.

2. technology. Wanxin lens adopts double protection technology, high temperature technology, transparency technology and beauty technology to upgrade the lens in four major technologies. Through the absorption of the substrate and the reflection of harmful blue light by the film, it meets the national standards and provides double protection, while Kodak lens does not have transparent technology and beauty technology.