The book Handbook of the Practice And Art of Photography was written by author Hermann Wilhelm Vogel Here you can read free online of Handbook of the Practice And Art of Photography book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Handbook of the Practice And Art of Photography a good or bad book?
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This is also the reason why the distance of the apparatus and the size of the field of vision are of so much importance in giving a true picture of an object. How, under these circumstances, and even with a perfectly correct perspective, quite abnormal figures are produced, the an- nexed picture of balls will demonstrate. Balls will always appear round to us, or circular; but when they are located at the margin of the field of vision — i. 6., when the rays intersect the plane of the picture und...er a very oblique angle, then the perspective figure, even when mathematic- ally correct, will be an ellipse. (See page 238.) Such a figure we will not consider a true one, as our eye has been accustomed to seeing a ball under any circumstances as a circle, and we cannot blame the painter when he ignores the rules of perspective and draws them always as circles. Unfortunately the photographer cannot do the same; he must reproduce the figure which the lens, constructed according to mathematical principles, furnishes.
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