Volume 29 1992
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Browsing Volume 29 1992 by Keyword "polarizing filter"
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Item A method of improving contrast in illustrations of coalified fossils(Bernard Price Institute for Palaeontological Research, 1992) Rayner, Richard JA simple, economic method of enhancing the contrast and, therefore, improving the qual ity of certain palaeontological photographic illustrations is outlined. The technique, which involves the use of polarising filters, in no way alters the negatives or prints. In recommending this technique, it is hoped some of the confusion arising from inadequate illustrations will be removed.