. The book of photography; practical, theoretical and applied. Fi. 902.—Yektical Stand with Horizontal Easkl and KEFLEctok. oi: tolerably long focus, and of excellentdefinition and covering power with a largeaperture. The reason for the lens havingto be of long focus is that, as before ex-plained, the screen distance depends onthe camera extension, other things being against the use of short-focus lenses, as,for instance, the fact that to obtainequally good definition to that possiblewith the long-focus lens the aperturewill have to be smaller, with consequent [loss of rapidity ; and also the
. The book of photography; practical, theoretical and applied. Fi. 902.—Yektical Stand with Horizontal Easkl and KEFLEctok. oi: tolerably long focus, and of excellentdefinition and covering power with a largeaperture. The reason for the lens havingto be of long focus is that, as before ex-plained, the screen distance depends onthe camera extension, other things being against the use of short-focus lenses, as,for instance, the fact that to obtainequally good definition to that possiblewith the long-focus lens the aperturewill have to be smaller, with consequent [loss of rapidity ; and also the very grave. ^9 BONES IN AN ENGLISH ADDER
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