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Individual
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Individual
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Priority to ES0033850UpriorityCriticalpatent/ES33850Y/en
Publication of ES33850UpublicationCriticalpatent/ES33850U/en
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Publication of ES33850YpublicationCriticalpatent/ES33850Y/en
Photographic calculating device of the class comprising two movable laminar elements, one with respect to the other, characterized in that one of said elements comprises means for fixing certain values of the variables involved in the calculation of exposure times and diaphragm openings, whose values correspond to specific working conditions that are taken as initial reference points for that, means related to said reference values, to determine the values corresponding to working conditions different from those of reference, means to operate with the values of the reference conditions and the conditions that differ from these, and indicating means of the combinations of possible results, as a consequence of the operation of said operating means, the other laminar element being equipped with tables to determine certain calculation factors in dependence on focal lengths of objectives and opening s of diaphragm, and means to determine based on these factors the depth of field corresponding to the above data. (Machine-translation by Google Translate, not legally binding)