Handbook of the practice and art of photography (1875)
Vogel, Hermann Wilhelm, 1834-1898, Molling, Edward F · Philadelphia, Benerman & Wilson · leaf 59
m the objective. Every objective acts not only as a lens, but also as a win- dow, and admits a great deal of diffused light, and this causes either fogging of the whole plate or interferes with the brilliancy of the pic- ture. This diffused light is easily discovered by placing the head under the… … surrounds the objective, and has only an opening in front, which can be opened and closed by a lid, m. Claudet and Bingham place the whole apparatus in a kind of tent which moves on rollers. The arrangement appears very clumsy*
Photography
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