The problem is to find a mathematical way to shortcut this problem. Only few companies have ability and will to do that , thats why Leica sells his last lens for 6000 euros
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Absolute nonsense. Lens design programs have been around since the early 1950s. Good ones are commercially available.

As for Leica, until recently they were mired in the dark ages. For all I know they still are. Zeiss and Nikon had smarter management, didn't tie their lens divisions to the camera business. Leica had a fine merchant lensmaking operation in Canada, sold it. Leica was run for many years by (choose at least one) short-sighted fools or fools who thought they knew than their customes what the customers should want.

In a way, they're like Rolex. If you want a timepiece that keeps good time, buy a Casio or Seiko. If you want an instrument of intimidation, buy a Rolex. Except that nowadays Leicas aren't intimidating.