. The book of photography; practical, theoretical and applied. Fis- 513.—Six Components of Beck-Stkinheil Orthostigmat. shown in Fig. 509. As a rule, the twocomponents of these lenses cannot be usedseparately, as in the rapid rectilinear modern anastigmat represents theliighest point of lens manufacture at any branch of photographic work. and 511 show^ two patterns of theBeck-Steinheil orthostigmat (anastigmat),and Fig. 512 indicates how a single com-bination may be used separately. The. GuEKZ Double Anastigmat. present attained. Astigmatism is prac-tically eliminated, the ot
. The book of photography; practical, theoretical and applied. Fis- 513.—Six Components of Beck-Stkinheil Orthostigmat. shown in Fig. 509. As a rule, the twocomponents of these lenses cannot be usedseparately, as in the rapid rectilinear modern anastigmat represents theliighest point of lens manufacture at any branch of photographic work. and 511 show^ two patterns of theBeck-Steinheil orthostigmat (anastigmat),and Fig. 512 indicates how a single com-bination may be used separately. The. GuEKZ Double Anastigmat. present attained. Astigmatism is prac-tically eliminated, the other correctionsbeing also remaikably successful. Itgives high rapidity and splendid quality ofdefinition, but, as a consequence, a certainamount of depth of focus has inevitablyt i be sacrificed. The universal anastig-
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
