. Photographic pastimes : a series of interesting experiments for amateurs for obtaining novel and curious effects with the aid of the camera. eportraits in the same way as that justdescribed. G go PHOTOGRAPHIC PASTIMES. As previously mentioned, all the por-traits are blended so as to obtain anaverage of expression, the time of exposurebeing divided into as many equal fractionsas there are portraits to be averaged, allthese fractional exposures being made onthe same sensitive plate. If, for instance,,60 seconds be required for the productionof a good copy of one of these portraits,and six port
. Photographic pastimes : a series of interesting experiments for amateurs for obtaining novel and curious effects with the aid of the camera. eportraits in the same way as that justdescribed. G go PHOTOGRAPHIC PASTIMES. As previously mentioned, all the por-traits are blended so as to obtain anaverage of expression, the time of exposurebeing divided into as many equal fractionsas there are portraits to be averaged, allthese fractional exposures being made onthe same sensitive plate. If, for instance,,60 seconds be required for the productionof a good copy of one of these portraits,and six portraits ought to be blended,then each fractional exposure wouldamount to one-sixth of the full exposure,namely, to ten seconds. The illustrations (figs. 33, 34, and 35)give an idea of the results obtainable bythis method. Figs. 32 and 33 are repro-ductions from photographs taken by Mr,F. Galton. The four ovals. A, B, C, D(fig. 33) are composites, and the por-traits in fig. 32 are individual portraits(Jewish boys in the Jews Free School,Bell Lane). A is the composite of thefive individuals a.^ to a^. B is the com- COMPOSITE PHOTOGRAPHS. QI. Fig. 32.—Individual Portraits, of which the PortraitsA AND B (Fig. 33) are Composites. 92 PHOTOGRAPHIC PASTIMES.
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidphotographicpast00schn
