Rather than being built from scratch with new designs, new camera lenses are designed by taking existing lens designs that work well and then improving on them. As a result, virtually every lens design can be traced back to one of six basic lens designs developed in the early 1900s (shown above). Roger Cicala of LensRentals writes,
Those original lenses in their pure form each had strengths and weaknesses. Modern lenses derived from them have ‘inherited’ those same underlying tendencies. Many of the complex technologies used in a modern lens are put there to correct the underlying problems of the original design.
Head on over to his post to learn about lenses derived from the first three of these designs.
Lens Genealogy Part 1 [Lens Rentals]