Binoculars, Opera Glasses and Field Glasses, by Fred Watson. 32 Pages. Softbound. Binoculars are today the most widely used of all optical instruments. They are found in most homes, and countless professionals depend on them to carry out their work. Vintage versions too are frequently seen, and many people have an old opera or field glass. Such items are rapidly becoming a valuable collectible. This book is the history of the development of these commonplace accessories of everyday life. It tells the complete story of binoculars, from their invention almost four centuries ago to the modern types we use today. It describes the natural miracle of binocular vision, explains the workings of the different types, provides a thorough glossary of technical terms, and contains numerous vintage black & white photos and engravings. It will be a valuable reference source for collectors and dealers, and of extreme interest to anyone who enjoys using binoculars, opera glasses, or field glasses. UNAVAILABLE (BK-0893)