POP
MULTI-COLOUR
Pop
filters come as a set of three. They are primary RED, GREEN and BLUE.
If
you take three separate photographs of a subject that contains some movement
through each of the filters in turn and then combine those three R,G and B images
you get a true colour photo except for where the movement has occured. It is
necessary to get the relative exposures correct as different camera sensors
have different sensitivities to R G and B.
This
is easily done by taking 3 individual photographs of a white piece of paper
through the R G and B filters in turn then repeat modifying the ratio of the
exposures of each colour until merging them give a white piece of paper as the
image. In the photos used below you can see the clouds, plants and hanging baskets,
which were moving, all have coloured fringes - the object of using pop filters.
