Minolta IIIF - Page 24

ADDITIONAL
INFORMATION
_
Obtaining Consistently Good Image Color
A color image and how it is perceived by the viewer is the final result of the interaction of various
factors,
including
film,
lighting
conditions,
processing,
and
viewing
conditions.
These
factors
can
be
considered
as
the
parts
of
an
overall system;
to obtain
consistently
good image
color,
all
parts
of
the
system must
be
kept
consistent.
To
do this, follow
the
steps below.
1
Purchase a quantity of film from the same emulsion batch and store the film under optimum
conditions until use.
Find a high-quality processing lab that produces consistent results and use only this lab for
processing.
Balance your viewing system to photographic daylight (6500K) and check it periodically.
* Because the spectral sensitivity of the Color Meter IIIF corresponds to the sensitivity of photo-
graphic film and not to the spectral sensitivity of the eyes, it is not recommended for use in
balancing your viewing system. For such purpose, a colorimeter with spectral sensitivity closely
matching that of the eyes (such as the Minolta Chroma Meter CL-100) should be used. Further,
since photographic color temperature alone is insufficient to exactly specify a color, it is recom-
mended that the viewing system be balanced using the x and y chromaticity coordinates of the
standard illuminant corresponding to 5500K. These coordinates are 0.332, 0.348.
The above three steps, together with using the Color Meter IIIF to control the color of the lighting,
will provide consistent results. However. the resulting color may be somewhat different from the color
results you would like. If this is the case, the system should be fine-tuned by adjusting the correction
values in the memory channels of the Color Meter IIIF according to the procedure on p. 19.
22