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by Mark D Segal
Introduction
Readers of the Luminous Landscape Forum (/forum/index.php?topic=49968.0and/forum/index.php?topic=49443.0) will recall that a question was raised about whether prints from the new Epson 4900 show colour inconstancy (CI), (often wrongly called “metamerism”). CI essentially means that the appearance of a unique hue changes according to differences of the various sources of illumination in which it may be viewed. A famous example from yesteryear: the Epson 2000P, where grays under incandescent light looked greenish under daylight (Metamerism  is about the colour of two objects looking the same under one illuminant but different under another.) Interest was also expressed in how the 4900’s prints compared with other contemporary Epson models such as the 9900 and the 7890.

Questions of Interest and Procedure
Responding to these questions and concerns, we are fortunate that Forum member Phil Brown (“Farmer”) was able to make te...

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Mark Segal
Mark Segal
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Mark has been making photographs for the past six decades and started adopting a digital workflow in 1999 first with scanning film, then going fully digital in 2004. He has worked with a considerable range of software, equipment and techniques over the years, accumulated substantial experience as an author, educator and communicator in several fields and is a frequent contributor to the Luminous-Landscape website. Mark developed a particular interest in film scanning and authored the ebook “Scanning Workflows with SilverFast 8, SilverFast HDR, Adobe Photoshop Lightroom and Adobe Photoshop” available on the SilverFast website. In his “other life” (the one that pays for the photography), Mark is a retiree from the World Bank Group and now a consultant in electric power development.
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