Lens design: then (1964) and now (1996) by Bruce H. Walker
ra% R:xX $]%<r?MUb- Much has been said and written about the changes to the lens design process over the recent decades. Having worked in this field for the past 30+ years, I have enjoyed being involved with many of those changes. This paper will share some general observations on the subject, and then quantify the impact of those changes by review of a specific lens design first executed in 1964 and then updated in 1996 by application of today's technology.
}.MoDR3\ @ojg`!, The lens design process
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