A dictionary of photography for the amateur and professional photographer (1889)
Wall, E. J. (Edward John), 1860-1928 · New York : E. & H.T. Anthony · leaf 176
or, placed at an angle of 45 degs. with the lens, and so adjusted that the axis of the lens is continued to the centre of the mirror ; e is a small door, which can be opened or closed at will. The camera is placed sideways towards the object, vvhich is reflected from the exterior surface of ad to… … ab is a hood to fit on lens to take the place of the cap. cc is a right-angled prism, whose breadth is greater than the diameter of the front glass of lens. All the surfaces except c c are enclosed in brass-mounting, but the surface H, opposite to the right angle, must not touch the glass. E is a…
Photography
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