AB
FIGURE 5.6A and B Two sky sections: A showing noise (quite fi ne, not too bad), and B with the noise removed using noise-reduction software. B
is more likely to be accepted.
AB
FIGURE 5.7A and B A illustrates a “bad” histogram from an underexposed shot. B is a lot better, with no large gaps at either end. Generally aim
for a histogram where there are data right up to but not touching the right side.
NOISE 87