A lens that focuses “beyond infinity” sounds theatrical and impossible, but some are actually made this way because of differential expansion of some of the specialized glass elements inside.

A lens that focuses "beyond infinity" sounds theatrical and impossible, but some are actually made this way because of differential expansion of some of the specialized glass elements inside.

A lens that focuses “beyond infinity” sounds theatrical and impossible, but some are actually made this way because of differential expansion of some of the specialized glass elements inside.