. The book of photography; practical, theoretical and applied. -Correction of Distortion by Use ofPetzval Lens. for copying, and for portraiture where thelight is good. For large heads the singlelens is preferable. It does not usually dis-tort, but in some cases there is a slightdistortion, which will be detected by thetest already described. Portrait Lenses. The portrait lens is the least us-eful forgeneral work, as it is specially constructedto give good and soft definition over onlya small area with a very large is generally fitted with a rack andpinion, by which the lens tube m
. The book of photography; practical, theoretical and applied. -Correction of Distortion by Use ofPetzval Lens. for copying, and for portraiture where thelight is good. For large heads the singlelens is preferable. It does not usually dis-tort, but in some cases there is a slightdistortion, which will be detected by thetest already described. Portrait Lenses. The portrait lens is the least us-eful forgeneral work, as it is specially constructedto give good and soft definition over onlya small area with a very large is generally fitted with a rack andpinion, by which the lens tube may be.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
