Tips to Prevent Under Exposure for Pocket-Consumer Digicam
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Tips to Prevent Under Exposure for Pocket-Consumer Digicam
Tips to Prevent Under Exposure. Generally, the pocket Digital camera (Digicam) consumer, complain that their result photos which is they get likely under exposure. Especially in flash photography (indoor), because this type of camera depends on the built-in flash that has low light intensity. Therefore, the coverage area is limited and some habit from the user when they shoot objects. They are often using the maximum point from flash coverage.
Several things that often happen are:
- on wide angle lens (zoom out max), only the mid area that light enough while into edge or corner part, it likely more dark. This cause by the limitation of flash area coverage (exclude the lens design trouble or vignetting)
- on tale lens (zoom in max), it is likely whole of the image is lightless(under). It causes by the zoom in position, the aperture openings wane. So, it need more light because the flash coverage shorten.
In orer to handle this problem, we should know the flash camera ability. Generally, in pocket camera, it only give the maximum flash coverage data, for example:
Wide angle: 3 m, tele: 2 m, on ISO 100
Every progressing about 1 stop/ double (ISO 200), that distance increasing up to 1.4 times, 2 stop / quadruple (ISO 400) it is double increasing and contrary if ISO decreases up to 0.5(ISO 50) it will decreases 0.7 times.
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Posted in Photography Tips