Abstract
THE getting of a large enough image of distant objects, or of near objects without an unpleasant proximity to them, is a difficulty that often presents itself to the photographer. A lens of greater focal length is theoretically serviceable in such cases, but the long camera that It would require may not be available, and if provided would often be troublesome to manipulate. This accounts for the popularity of telephotographic lenses. Some of them have the positive and negative elements fixed with regard to each other, and then they differ little, if at all, in their use from lenses of the ordinary simple type. But when the two elements are adjustable with regard to each other, in order to allow of obtaining various sizes of the image, many new problems arise. We therefore welcome this little volume, in which these problems are dealt with in a practical and very concise manner.
Telephotography.
C. F. Lan-Davis. Pp. xi + 130. (London: G. Routledge and Sons, Ltd., n.d.) Price 2s. net.
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Telephotography . Nature 90, 461 (1912). https://doi.org/10.1038/090461b0
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DOI: https://doi.org/10.1038/090461b0