The Lens: A Practical Guide To The Choice, Use, And Testing Of Photographic Objectives is a comprehensive guidebook written by Thomas Bolas in 1902. The book is aimed at both amateur and professional photographers who want to learn more about the technical aspects of lenses and how to use them effectively. The book covers a wide range of topics related to lenses, including the history of lens-making, the different types of lenses available, and how...