. The book of photography; practical, theoretical and applied. I Fig. 323.—Rays Focussed on Source of Light. iure or in such position as to refocusthe rays on their source—a state ofi;;hings always aimed at with other illu-mlnants (see Fig. 323), but should let thernissue more widely. (See Fig. 324 and com-pare with previous figure.) Gas Light. Of the ordinary gas light nothing needbe said beyond the fact that a fair sized jetshould be used. The Economiser burnerfor slipping over the ordinary jet is an. Fig 324.—Rays Reflected Approximately Parallel improvement. The reason for preferring alarg
. The book of photography; practical, theoretical and applied. I Fig. 323.—Rays Focussed on Source of Light. iure or in such position as to refocusthe rays on their source—a state ofi;;hings always aimed at with other illu-mlnants (see Fig. 323), but should let thernissue more widely. (See Fig. 324 and com-pare with previous figure.) Gas Light. Of the ordinary gas light nothing needbe said beyond the fact that a fair sized jetshould be used. The Economiser burnerfor slipping over the ordinary jet is an. Fig 324.—Rays Reflected Approximately Parallel improvement. The reason for preferring alarge flame is that the larger tbe sourceof light, in proportion to the negative, thesofter will be the effects. This refers moreparticularly to vignetting, and to such cases where dodging has to be doneon the back. Electric Light. Certainly the most convenient light isthe electric incandescent, which has no
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
