It corrects color diffusion.The old lenses use lots of pure lens pieces to correct it, but now it takes maybe one coating of that film to fix it, so this is the color that I want.

• 它是要校正色散，而老镜头是用很多个纯粹的镜片来校正的，而现在可能一个镜片镀一层膜就能解决，所以这个也是我要的一个颜色。