Photography Exposure (Basics Photography) by David Präkel

Author:David Präkel [Präkel, David]
Language: eng
Format: azw3
ISBN: 9781474250016
Publisher: Bloomsbury Publishing
Published: 2017-07-06T04:00:00+00:00

4.5 Different types of light meter

Incident light meters measure light that is falling on the subject. Reflected light meters are used in cameras because we have to point the camera at the scene we wish to photograph.

Compact cameras will have a small sensor underneath a forward-facing clear window or to the edge of the viewfinder. If you use such a camera make certain you know where the light meter cell is placed. Take care not to obstruct it or cast a shadow on it with your hand when you are holding the camera. Check with both vertical and horizontal grips.

Incident light meters are hand-held devices, usually with a diffuser over the light-sensitive cell that will average and approximate to the light falling on the subject. In some designs this can be moved aside, and the incident light meter used instead as an averaging reflected light meter by pointing it directly at the subject.

The most sophisticated meters feature a diffuser that can be used in an erect position to give correct readings for the light falling on three-dimensional objects. Additionally there is a retracted position where the dome is partly let down into a dark tube, this setting is suitable for flat artwork. The retracted position can also be used to measure light directly from lamp heads in the studio to determine lighting ratios.

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