This book is a tribute to the legacy of lens designer Rudolf Kingslake, a pioneer in the field who taught lens design for 56 years at The Institute of Optics at the University of Rochester. The book introduces a collection of over 150 of his lens design problems, which were handwritten on index cards and used in Kingslake’s courses from the 1930s to the 1980s. Each problem is accompanied by detailed solutions and organized by topic, including:Ray TracingFirst-Order OpticsMonochromatic AberrationsChromatic AberrationsThin Lens AberrationsOptical Systems & Designs