It was taken
quite a few years ago with a triple exposure on a Nikon. The first exposure was
taken through a primary green filter ,then a primary blue and finally a primary
red one. The camera was on a tripod of course. As you know red light + green +
blue light will give you white light so if nothing moves you should get normal
colours but if the subject moves then you get some interesting effects. You will
have to do some tests to work out the correct exposure. But as a guide I normally
give 1/3rd of the exposure to each exposure but you also have to take into consideration
the different filter factors.