Gossen Starlite - Manual (Page 35)

GOSSEN Foto- und Lichtmeßtechnik 35
Negative film
If the difference between important bright and dark
areas does not exceed two stops (EV) between
important bright and dark areas are not exceeded,
each value in between these values could be used
as the setting value; for greater demands the
average value is more suitable. In most cases,
you will achieve a reasonable shot. Rather dense
negatives produce poorer defined contours.
For negatives, the smallest density that can copy
is important - thus, you should use more exposure
rather than too little.
Color reversal film
In comparison to a negative film, a color reversal
film can deal with greater subject contrast, but
offers far less scope for usable exposure.
Measuring the subject contrast is the basis for the
decision as to whether the subject can be repro-
duced realistically. Unless the subject requires
something else, we recommend that the exposure
should be based on the highlights.
For color reversal films, the bright areas that are
crucial for the shot are important. Bear this in
mind, and use somewhat shorter rather than
longer exposure. This produces more brilliant and
richer colors.
Night atmosphere
If you wish to realistically capture the night atmos-
phere with a lot of dark and little detail, you must
use less exposure than your Starlite displays. This
will prevent your photo being similar to a daytime
shot. However, the Schwarzschild effect often has
the same effect as less exposure.
There are no set rules for this. In order to obtain
experience, take your first shots with unaltered
values that are given by the Starlite.
Schwarzschild effect
Shots with little light require particularly long
exposure times. For all brands of film, what is
known as the Schwarzschild effect occurs here:
The measured times must be increased for the
shot to avoid under-exposure. Various types of film
show the effect to different degrees.
This is why it is not taken into account in the
Starlite. In general, this effect does not occur for
exposures below 1/10 s.