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Buying advice.

Why is Speed Importent?

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Buying advice

Digital cameras
Product group
Digital cameras
Items analyzed
262
Date
22. 05. 2012
Data source
QualityZoom
Realtime Analytics
Film speed is measured in ISO and is an important quality factor. Even simple cameras provide speeds of ISO 1600 or ISO 3200 (much higher than regular conventional film). The danger of higher ISO is a grainier picture with grainier colors. However, higher sensor SLR cameras take photos which are not as grainy as photos taken with high sensor compact cameras.

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Glossary

ISO

ISO stands for "International Standard Organisation", which is an international committee for the definition of worldwide standards for the sectors computer technology and also photography. In the sector of photography ISO describes light sensitivity of an image converters or films. Standard ISO-values range between ISO 25 and ISO 6400. At a high ISO-setting the film (or image converter) needs little light for the creation of a photo as compared to a low ISO value. In contrast to films, image converters have a fixed light sensitivity. Is the image signal strengthened however, a high light sensitivity can be simulated.

Luminosity

The ratio of the maximum possible aperture (expressed through a f-number) to the focal length is called the luminosity. A lens has a higher luminosity, the higher its maximum aperture is and therefore light, acting upon the film or sensor, is transmitted.

Exposure Compensation

The light meter of a digital camera measures automatically exposure to light. The resulting values for shutter speed and aperture can be adjusted subsequently in cameras with exposure compensation (f.E. by turning of the adjustment knob).