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Photographer's Note

Having recently purchased a new telephoto lens, I decided to take some shots of passing traffic on the River Thames. This picture, however, was an experiment in the control of depth of field - an effect prevalent at longer focal lengths. The subject (man and child) was taken from such a distance that it was framed accurately at the maximum focal length of 200mm. The camera was set to Aperture Priority Mode, and the lens set to its maximum (largest) aperture size - f/5.6. The combination of long focal length / large aperture resulted in a 'shallow depth of field' - objects immediately in front of / beyond the subject remain out of focus. Had a subject been pictured at closer range with the same focal length / aperture setting, the picture would have resulted in an even shallower depth of field.

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Additional Photos by Robert Blackmore (falcon53) Gold Star Critiquer/Gold Note Writer [C: 64 W: 0 N: 54] (336)
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