The Lens: A Practical Guide To The Choice, Use, And Testing Of Photographic Objectives is a comprehensive guidebook written by Thomas Bolas in 1902. This book is a valuable resource for photography enthusiasts, professionals, and students who want to learn about the choice, use, and testing of photographic lenses. The book covers various aspects of lenses, including their history, construction, and principles of operation. It also discusses the different types of lenses, their characteristics, and how to select the right lens for different photography applications. The author provides detailed information on lens focal length, aperture, depth of field, and other technical aspects that are essential for capturing high-quality images.Moreover, The Lens includes practical advice on lens maintenance, cleaning, and repair. The author also provides step-by-step instructions on how to test lenses for quality and performance, including tests for sharpness, distortion, and chromatic aberration. The book also features numerous illustrations and photographs that help readers understand the concepts explained in the text.Overall, The Lens: A Practical Guide To The Choice, Use, And Testing Of Photographic Objectives is a timeless classic that remains relevant today. It is an essential reference for anyone interested in photography and lens technology.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.