This so far has been the easiest of the exercises in part 3 which does make me question whether I have got it right, or maybe I just chose a suitable image to work with.
I went back to my pictures of last summer’s Bristol Balloon Fiesta and chose a colourful shot of a number of balloons tethered and waiting to fly. As required by the exercise there were a number of bright contrasting colours and I chose to work with red and blue.
I had experimented with sliders in an earlier exercise but hadn’t really focused on the impact of using particular sliders with particular colours so this was a useful activity.
As I moved the red slider to the right the red tones became weaker, almost disappearing by the time the slider got to 100% and at the same time the blue tones became stronger. The reverse was the case when the slider was moved to the left to the point that red tones became black when the slider was moved to -100.
Exactly the same happened with the blue slider; the tone became much weaker as the amount of blue was increased and black as the slider came back to the left resulting in this case in a very dramatic sky. A similar effect, although not nearly so pronounced, was achieved when using the orange and purple filters. So in summary, the colour slider, or colour filter will weaken the tone of similar colours and at the same time strengthen complementary colours, so this is a tool that could be useful in achieving certain creative moods in black and white photography.