Modern Telephotography: A Practical Manual of Working Methods and Application

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Ross Limited, 1910 - Telephotography - 95 pages
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This work contains information on telephotography for novices and beginners.
 

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Page 89 - To obtain the necessary adjustments a setting with rack and pinion is provided in several sizes to suit various positive and negative lenses. Any good photographic objective may be used in conjunction with tele-negative lenses, but the " Homocentric " is specially recommended, and it is to utilize to the full the excellent qualities of this lens that the Ross' Tele-negatives have been specially constructed.
Page 93 - The Lens Board has extensive rise and fall, so that the foreground may be limited, and high buildings or monuments included in the picture. A Cross Movement is also provided for horizontal pictures. One Winding Head sets the shutter, and regulates for time and instantaneous exposures of varying duration, so that the camera is without any other external projection. It is unlike other cameras in this respect as also in the advantage of re-adjustment of the blinds for speed either before or alter setting...
Page 89 - Negative lens, the focns and consequent magnification of the image being regulated by their relative positions. Were the separation equal to the difference of their focal lengths, a telescopic combination would be formed, or if the separation were equal to the focus of the Positive lens, no magnification would take place, but all approximation from this point lengthens the focus, enlarging the image. To obtain the necessary adjustments, a setting with rack and pinion is provided in four sizes to...
Page 93 - FOCAL-PLANE SHUTTER. Is the most perfect form of Hand Camera and has been constructed to meet the demand for a folding camera of the highest class suitable for all requirements of up-to-date photography. It will be f jund reliable under all circumstances, and efficient in every emergency that is likely o arise. The "PANROS" is compact and of convenient size, light in weight, and easy of manipulation.
Page 93 - (PATENT) Is the most perfect form of Hand Camera and has been constructed to meet the demand for a folding camera of the highest class suitable for all requirements of up-to-date photography. It will be found reliable under all circumstances, and efficient in every emergency that is likely to arise. The "PANROS" is compact and of convenient size, light in weight, and easy of manipulation.
Page 93 - PANROS" Focal-plane Camera with Ross' Patent " Homocentrio " Lens, .f/6'3, in focussing Mount, adjustable Focal-plane Shutter for time or Instantaneous Exposures, three solid Double Dark Slides and Black Leather carrying go a A Ditto, with " Homocentric " lens, /76'8 instead of f(B...
Page 18 - Telephoto system the equivalent focus may be very long, while the back focus, or distance from the back of the lens to the focussing .screen, is quite short.
Page 93 - Case, hand-sewn, with Spring Lock and Sling Shoulder Strap in place of ordinary case, to hold Camera and...
Page 13 - Monograph on the Nature and Application of Tele- Photographic Objectives,
Page 35 - Telephoto work, but, in the majority of cases, they will be found to be...

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