Aspherical lens element

摘要

I AM AN aspherical lens element and I have helped to improve the optical quality of camera lenses in recent years. You may have seen 'Asph' or 'Aspheric' marked on a camera lens or in lens specifications. It's now widely regarded as a mark of excellence. In a perfect world, all lenses would work like a pinhole camera Jens. This would mean there would be no distortion, and focus would be uniform across the frame.