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March— April, 1943
THE CINE-TECHNICIAN
31
PHOTOGRAPHIC OPTICS— continued
are dealt with fully and in a most interesting and reasonably simple manner in this excellent volume. It is true there are what at first appear to be rather complicated diagrams and tables, but these are all very clearly explained and are easily understood.
It is impossible to give the full contents of this admirable piece of work. So far as photographic lenses are concerned there is practically nothing which is not dealt with. For the cine-cameraman there is a lot of information about depth of focus and crispness, which, in view of the tendency these days to stop down on interiors, cannot fail to be of interest ; for the still cameraman interesting data about the rising front and swinging back, the panorama camera and soft focus lenses ; for the darkroom man information concerning enlarging and enlarging lenses ; for the assistant cameraman depth of focus tables and help in the constructing of lens hoods and useful information
about view-finders, etc. And-for all grades useful details about such things as the nature of light, polarising filters, infra-red filters and stereoscopic photography.
There are those who will say what does it matter how a lens works so long as it is a good one and is getting satisfactory results. But who can say that the results won't be even better if practical knowledge is backed by a little theory. I have been shocked on many occasions by the lack of theoretical knowledge among the younger members of the camera department, and I therefore particularly recommend to them to read this book. Photographic Optics is one of a series of books that have recently been published under the title of " Manual of Photo-technique." The possession of the entire series would mean having at one's disposal a complete library of photography, which every photographic cine-technician would be well advised to possess.
Ronald Neame
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