Re: Subject: I suspect the original art pigments along with the 1Ds Mark
Re: Subject: I suspect the original art pigments along with the 1Ds Mark
- Subject: Re: Subject: I suspect the original art pigments along with the 1Ds Mark
- From: José Ángel Bueno García <email@hidden>
- Date: Thu, 10 May 2012 02:06:57 +0200
Hello Robert:
Yes, scan backs for large format cameras are not compatible with flash
units for illuminate art work. I understand the use of continous light
source in your workflow. Sadly cameras with CFA sensor are more
affordable than large format cameras and scan backs that fit them. And
don't mention the wide affordable options in 35mm lens. Large format
cameras are premier league. The institution owns a Sinar and can't
migrate to digital due to crisis and expensive scan backs or medium
format CFA backs.
The problem with fluorescent tubes or LED lamps is that are simulators
of the spectral power distribution of white (sun) light, and both show
pikes. Strobes are better aproach. And can be considered as an
opinion, but is demonstrable with a plot of Robin Myers's Spectrashop.
Someone in this list commented that simple glass is UV cut, but only
can mention his afirmation because haven't more data. Would be
usefull.
On the other hand the emision in the UV band is common in sun light
too, and termal fluctuations can even change the response of
calibration tiles, so we have to learn to coexist in this way.
The next approach going to test is to work with "standard" high
quality gallery light source of exhibition hall at institution. In
some circles mention that is better to capture under (and/or simulate)
exhbition conditions for the average human eyes.
Jose Bueno
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