“The above is the title of a surprisingly large twenty-live cents’ worth of practical in- formation concerning photographic lenses, their properties, functions, and use. It is written by R. D. Gray, a gentleman whose practical and technical knowledge of photographic optics qualifies him to speak authoritatively. The book is well illustrated, both with the necessary diagrams to supplement the text and examples of photographic work of different kinds. Some idea of the contents may be gathered from a few of the chapter headings, amongst which are: Testing Lenses, Table of View Angles. Copying, Shutter Efficiency, and Photographing Tall Buildings.”
“Copies can be obtained, postpaid, upon receipt of twenty-five cents, from Gray, Lloyd & Company, Ridgewood, New Jersey.”
— Description from Camera Craft: A Photographic Monthly.
Volume XVIII, San Francisco, 1911.