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The photographic news
- Bandzählung
- 27.1883
- Erscheinungsdatum
- 1883
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- Englisch
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- Hochschule für Grafik und Buchkunst Leipzig
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- Hochschule für Grafik und Buchkunst Leipzig
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- SLUB Dresden
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Zeitschrift
The photographic news
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Band
Band 27.1883
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- Titelblatt Titelblatt I
- Register Index III
- Ausgabe No. 1270, January 5, 1883 1
- Ausgabe No. 1271, January 12, 1883 17
- Ausgabe No. 1272, January 19, 1883 33
- Ausgabe No. 1273, January 26, 1883 49
- Ausgabe No. 1274, February 2, 1883 65
- Ausgabe No. 1275, February 9, 1883 81
- Ausgabe No. 1276, February 16, 1883 97
- Ausgabe No. 1277, February 23, 1883 113
- Ausgabe No. 1278, March 2, 1883 129
- Ausgabe No. 1279, March 9, 1883 145
- Ausgabe No. 1280, March 16, 1883 161
- Ausgabe No. 1281, March 22, 1883 177
- Ausgabe No. 1282, March 30, 1883 193
- Ausgabe No. 1283, April 6, 1883 209
- Ausgabe No. 1284, April 13, 1883 225
- Ausgabe No. 1285, April 20, 1883 241
- Ausgabe No. 1286, April 27, 1883 257
- Ausgabe No. 1287, May 4, 1883 273
- Ausgabe No. 1288, May 11, 1883 289
- Ausgabe No. 1289, May 18, 1883 305
- Ausgabe No. 1290, May 25, 1883 321
- Ausgabe No. 1291, June 1, 1883 337
- Ausgabe No. 1292, June 8, 1883 353
- Ausgabe No. 1293, June 15, 1883 369
- Ausgabe No. 1294, June 22, 1883 385
- Ausgabe No. 1295, June 29, 1883 401
- Ausgabe No. 1296, July 6, 1883 417
- Ausgabe No. 1297, July 13, 1883 433
- Ausgabe No. 1298, July 20, 1883 449
- Ausgabe No. 1299, July 27, 1883 465
- Ausgabe No. 1300, August 3, 1883 481
- Ausgabe No. 1301, August 10, 1883 497
- Ausgabe No. 1302, August 17, 1883 513
- Ausgabe No. 1303, August 24, 1883 529
- Ausgabe No. 1304, August 31, 1883 545
- Ausgabe No. 1305, September 7, 1883 561
- Ausgabe No. 1306, September 14, 1883 577
- Ausgabe No. 1307, September 21, 1883 593
- Ausgabe No. 1308, September 28, 1883 609
- Ausgabe No. 1309, October 5, 1883 625
- Ausgabe No. 1310, October 12, 1883 641
- Ausgabe No. 1311, October 19, 1883 657
- Ausgabe No. 1312, October 26, 1883 673
- Ausgabe No. 1313, November 2, 1883 689
- Ausgabe No. 1314, November 9, 1883 705
- Ausgabe No. 1315, November 16, 1883 721
- Ausgabe No. 1316, November 23, 1883 737
- Ausgabe No. 1317, November 30, 1883 753
- Ausgabe No. 1318, December 7, 1883 769
- Ausgabe No. 1319, December 14, 1883 785
- Ausgabe No. 1320, December 21, 1883 801
- Ausgabe No. 1321, December 28, 1883 817
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Band 27.1883
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for simplicity sake, that the force applied by the elastic remained the same during the whole motion ; but this is far from the case. If we take the diminishing tension of the elastic, we find ourselves involved in a problem which is difficult to work out accurately ; but this we may see distinctly—that the forces applied by the elastic in the cases supposed would have to be at the commencement con siderably more than three and eight ounces, and that the risk of shaking the camera would be correspondingly increased. The condemnation of the use of elastic which we apply to the shutter of the drop form—that is, the one with one moving part—must be understood not to apply to that which has two parts moving simultaneously in opposite directions. In this case the reaction of the one which would act on and move the camera is exactly counter acted by the reaction of the other. THE TRIMMING OF PRINTS. Mr. W. Thomson, of Aberdeen, sends us some details with regard to his experience in punching out carte-de-visite prints by means of a steel cutter, such as is employed in cutting out envelopes; the two principal advantages of this method being the rapidity with which a large number of prints may be cut out, and the uniformity of size which is ensured. Suitable dies or cutters can be obtained to order in London and most large towns at a moderate rate—we believe from 6d. to 9d. per linear inch of cutting edge—and, if carefully used, they will remain in good order for years. Mr. Thompson says:— I use a die, a block of lead, and a mallet; and the enclosed photograph will give you some idea of the various articles in use. For C.D.V. size, I cut a whole sheet of paper into cartes with one stroke of the mallet, this being a very great saving of time, and also makes very much superior work to the knife and cutting glass ; moreover, the corners are nicely rounded to suit the round-cornered card mounts. A A.—The die. B.—The moulded lead block or plate, 10 by K in. C.—Block of cast iron, which is not required if a good solid table is at hand to lay the lead on. D.—The mallet. F.—The cut paper as it falls out of the die. The round hole in the centre of the die, A, is to admit a pencil for pushing out the cut paper. One of more elaborate con struction could be made, with a spiral spring, for the same purpose. E.—Negative showing the register paper in position. Any number of these papers can be opt from waste albu- menized paper. It is scarcely necessary to say that the prints must be so piled up as to ensure the exact superposition of the corresponding parts of the various impressions; and Mr. Thomson’s method of working to a register paper attached to the negative is easy, and will be found very convenient; but we have found a slightly modified system rather more convenient in actual practice. Two small patches of black varnish (say, about one eighth of an inch in diameter) are painted on the negative, just beyond the limits of the portion required to be in cluded in the stamped out picture, one of these patches being, let us suppose, at the top, and the other at the bottom. In the centre of each black patch a small round hole is cleared out with a pointed tool, so that the main patch prints white, and the central spot black. The prints which are to be cut at one time—perhaps three or four dozen—are now impaled on a couple of pins, care being taken that all face in the same direction, and that the pins run exactly through the register dots. The circumstance of the paper expanding rather more in one direction than the other affects the register to a trifling extent, but not so much as to occasion any inconvenience. Instead of cutting on a leaden plate, many persons prefer to use a board or slab of lime-wood, which has been sawn transversely, so that the end of the grain shall be directed towards the cutting edge of the die. We strongly recommend those photographers who turn out considerable numbers of carte pictures to adopt the method of cutting them out with a die; but for cabinets, and larger photographs, the advantages of trimming by means of the die are not so considerable. NEW FOREIGN LENSES. The progress made in photographic chemistry finds its counterpart, apparently, in the realms of photographic optics. In this country the two leading firms of Dallmeyer and Ross and Co. have both of them novelties in store; and from Germany we hear that instruments of new con struction have of late made their appearance. Of these latter we propose to speak, for, since photographers abroad employ English lenses to a large extent, it is only fair that we, in this country, should say something about foreign optics in return. Most opticians have busied themselves in the construc tion of compound lens systems. Since the introduction of the excellent wide-angle single-combination landscape lens of Dallmeyer, in 1864, single lenses have undergone no alteration. Moritz Mittenzwey, of Zwickau, in Saxony, among others, has recently brought out a single lens of particular construction. This instrument is said to embrace a very large field, and is always in focus. For portraiture is said to work with an aperture of J of the focus ; while in the case of group photography, the aperture is | of the focus. Even with a very large opening, there is very little un sharpness, we are told; but until the instrument has been patented, and is properly put before the world, it would be unsafe to allude more fully to the wonderful qualities claimed for it. The well-known firm Franais, of Paris, has made some stir of late with its "nouvel objectiv rectilinear it foyer multiples.” The construction is aplanatic, and by interchange of the different lens pieces—we think neither Messrs. Ross and Co. nor Mr. Dallmeyer would recom mend such a course with any of their lenses—as many as nine different combinations may be produced of different focus and power. The most powerful combination of these is about equal to that of a rapid rectilinear; while other aplanatic combinations are suitable for large land scapes, and give such straight lines, we are told, that they may be employed for reproductions. For tourists the lens is therefore a universal instrument; only he must be an intelligent tourist, for otherwise, like the fox in the
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