Virtually all people have an interest in sport optic products and they should have some basic knowledge about them prior to making a purchase. This book is intended to help consumers make the best decision possible for their needs. Intended for consumers who are interested in purchasing sport optics products, for sales and marketing people who sell or support these products and for those who have an interest in optical products. The most comprehensive and accurate book ever written covering basic optical technology but written in an easy to understand language that is clear and interesting. The optical knowledge in the book counteracts many optical misconceptions and errors as well as ad slogans and hype.