Gossen DIGISKY - Handbuch (Seite 32)

GOSSEN Foto- und Lichtmesstechnik GmbH 32
Negative Film
Negative film has reasonably broad exposure latitude. Providing there is not more than
two steps (EV) between bright and dark areas of a scene, then any exposure value in-
between these two can be used as the exposure setting. The average value can also
be used, but it usually suitable for more exacting demands.
Denser negatives result in reduced acutance. In the case of negative film, the lowest,
but nevertheless still printable, density is important. Consequently it is better to
overexpose slightly, rather than to underexpose.
Digital Photography
– Colour Reversal Film
In comparison with negative film, colour reversal film is capable of managing greater
subject contrast, but its exposure latitude for practically usable results is considerably
smaller. It is the reading of the subject contrast that is the basis for deciding whether the
subject can be reproduced realistically - or not. If the subject allows, it is recommended
to measure towards the highlights.
In the case of colour reversal film, the key highlights of the image are most significant.
Keep this in mind and remember that it is better to underexpose slightly rather than to
overexpose. In this way, the colours will appear more luminous and rich.
Night Photography
For accurately capturing a night scene with a lot of darkness and very little detail, it is
best to use less exposure time than indicated by your DIGISKY, in order to make sure
that the image does not look like a daytime exposure. However, there are no firm rules
in this case. So, in order to gain experience, it would be best to start with exposures
which use the unchanged value from the DIGISKY and bracket for flexibility.
Snow Photography
If a landscape is completely covered with snow, the reflected light measurement will
generally result in underexposure. Due to the extraordinary high reflection of the snow,
parts which are relevant for the image might be underexposed. To adapt the
measurement accordingly add 1 to 1½ f-stops.
It is highly likely, however, that the best results will still be obtained by the incident light
measurement, which immediately provides the correct exposure value. If you want to
include special effects, for example to emphasize fine detail in shadow within the snow,
you should expose about ½ f-stop lower.
DIGISKY enables you to make precise measurements for each and every photographic
application, but it is important to note that not every recording device/media is able to
accurately record the same, wide contrast variances as DIGISKY.