Telephoto Work

Author : Henry Goodridge Deller
Publisher : Rarebooksclub.com
ISBN 13 : 9781230043906
Total Pages : 24 pages
Book Rating : 4.0/5 (439 download)

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Download or read book Telephoto Work written by Henry Goodridge Deller and published by Rarebooksclub.com. This book was released on 2013-09 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...greatest magnification are obtained. Make these marks and numbers as deep as possible, and then with the finger rub in some black enamel, so that they are easily distinguished. It was found that with a camera extension of about 12 in., magnification up to six diameters could be obtained, using the 2%-in. monocle, which was a distinct advance on the earlier trials. The simplest method of finding the focal length of the combination is to multiply the focus of the positive lens by the number of magnifications. The f value of the stop used on the positive is also found by multiplying by the magnification. Perfect rigidity in both camera and stand is imperative, and the camera should have ample swing back and rising front. The best results will always be obtained by the use of a positive of the greatest rapidity, combined with great equality of illumination. Focus carefully, and with the stop to be used. Choose, if possible, the best atmospheric conditions--i.e. as free from haze as possible, particularly where very distant views are the object. An "Iso" screen will probably be found useful when any haze or fog is present. The exposure required will most likely be less than actually indicated by the stop used in photographing distant scenery, in order to secure sufficient contrast in the negative. Development should be slow, and with developers which tend to give density with clear shadows, or with an excess of the reducing agent when using pyro-soda or pyro-ammonia formulae. Focal length and perspective, 28. Focal plane shutter, 12. Focussing, 13., HAzE, 24, 31. High versus low power, 10. Home-made telephoto lens, 57. Iso screen, 25. Macmr1cxr1ox, 16. Moving objects, 43. Monocles, 57. PANORAMA with telephoto, 30. Portraiture, 37....