Message-Id: <199906012238.PAA21810@dns.ccit.arizona.edu> Date: Wed, 2 Jun 1999 08:34:51 +1000 From: Lowan Turton <mailto:turtonl@AGRIC.NSW.GOV.AU> Subject: Re: Digital Camera and Lighting To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
To try showing the gilt in the artwork use a white reflector behind(above) the camera so that it reflects in the metallic gold. The reflector needs to be lit so that it is WHITE.Some photographers use "tent" lighting by totally building a translucent "tent" over their subject(artwork) with a tiny hole for the camera lens to poke through and light the outside of the "tent" so the subject(artwork) is lit evenly from ALL directions.
Hope this helps.
Lowan Turton Scientific Photographer NSW Agriculture EMAI Australia
On Tue, 1 Jun 1999, Martin Liebetruth wrote:
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> The State- and University Library in Goettingen, Germany, is
> planning to scan older and valuable books, some of them
> printed on parchment.
>
> Since we are testing the technical environment
> (digital scanback: Picturegate 8000 from Anagramm
> [www.anagramm.de], with the principle of a line scanner;
> lighting: flourescent lights with Osram Dulux lamps), we
> discover several problems.
>
> Especially the heat of the lamps is causing us headaches:
> from the preservational point of view, a temperature of
> about 22 degrees Celsius is optimal. But tests with the
> lamps I mentioned brought us up to 26-28 degrees.
> Are there any recommendations or experiences with other
> lighting facilities that would meet our goal (daylight
> lamps, no heating, constant light)?
>
> Also, we have some problems capturing gilted pages.
> This is more a photographical topic, but maybe someone can
> give us some advice how to position the lighting.
> So far, we discovered that because the gilted pages are not
> even and no glasplate can be put upon the valuable material,
> the reflexion of the gold is not easy to handle. Parts of
> the gilt are fine, others are represented on the screen in
> grey or brown colors.
> What are your experiences or tips with this special lighting
> situation?
>
> Martin Liebetruth
> Lower Saxony State- and University Library Goettingen,
> Germany
> Papendiek 14
> D-37070 Goettingen
>
> mailto:liebetru@mail.sub.uni-goettingen.de
> http://www.sub.uni-goettingen.de/gdz
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