SINCE publication of the sixth edition a number of significant advances in photographic equipment, materials, and practices have been made. Cameras have become more sophisticated and the 110 format has been introduced. Special cameras for "instant-print" colour materials are becoming increasingly popular and two major manufacturers now produce separate systems for this type of photography. Resin coated papers have become available for black and white as well as colour printing together with appropriate processing equipment. The move to smaller format cameras has necessitated the introduction of a new generation of colour films and the processing and printing of colour materials has become simpler and quicker. These and other developments are included in the present edition. As editor of the new edition I have followed the example set by previous editors in directing the emphasis towards the principles underlying the practice of photography, although this edition still contains much useful practical information which should be of value to all those involved in photography. In the previous edition two chapters were devoted to colour photography which appeared at the end of the book. In view of the extensive use of colour materials now made by virtually every photographer, much information on colour has been integrated within the main body of the text in this edition, as well as devoting two chapters exclusively to colour. Many chapters have been completely re-written to take into account modern developments in the theory and practice of photography but those chapters which still have relevance to present day theory and practice have been retained, with appropriate additions and modifications. In a book which deals with many diverse aspects of photography it is not possible for any single author to write authoritatively on all aspects. Like the previous editor, Mr.Alan Horder, I have enlisted the aid of a number of contributors and should like to acknowledge the contributions of my colleagues at The Polytechnic of Central London. Thanks are due to Mr.S.Ray for contributing Chapters 3 to 11 on light sources, lenses, cameras and accessories, and for contributing sections on colour printing in Chapter 22; Mr. G.G.Attridgefor Chapters 13-16 and 24 concerned with sensitometry and colour, and for contributing a section on white light and colour mixtures to Chapter 2; Mr.N.R.Axford for Chapter 25 on image evaluation and for contributing on latent image formation to Chapter 12. Это и многое другое вы найдете в книге The Manual of Photography