For this exercise I had to take three pictures of the same subject under different lighting conditions, the first picture was taken in full sun at mid-day, the second was taken at the same time but in shade and the third was taken in evening sunlight. The idea of the exercise is to see if the difference in colour temperature is evident in the pictures, the mid-day light should be colourless, the shade should be blueish from the reflected light from the sky and the evening picture should be more red.
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| Full Mid-Day Sun |
In this series of pictures I have asked my wife to wear a white t-shirt in the hope that it would make any difference in colour temperature more obvious. As you can see in the picture above in full sun there is no colour caste in the image because the mid-day light has the full spectrum of colours that make up white light.
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| Mid -Day shade |
This picture was taken at the same time as the one above but in the shade, as you can see especially in the t shirt there is a definite cool tone. This is because, out of direct sunlight, the only light to reach the subject is reflected from the blue sky above.
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| Evening Light |
As you would expect in the evening the light has a definite warm tone, this is because as the sun gets lower to the horizon the blue part of the spectrum is filtered out by the increased amount of the atmosphere that the light has to travel through.
One point to make is that although I have written about warm and cool tones, when it comes to colour temperatures it is the opposite to what you would imagine, blue light has the higher colour temperature and red the lower.
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