There are several kinds of meters on the market that are designed to make the art of photography more accurate and easier. The most popular are color meters, flash meters, and light meters. The majority of cameras come with built-in exposure meters. However, some photographers like to use separate meters.
A built-in exposure meter will typically read the light that is reflected. But this measurement could be inadequate because built-in meters sometimes don’t compensate for low or high contrast images.
To get accurate photos, you need to have the right exposure control. A built- in meter can read the setting inaccurately and this will end up in underexposed photos. Using a handheld meter will give you more accuracy and control.
An incident meter will measure the light that’s falling on your subject. It’s ideal in studio photography in which accurate color reproduction and illumination balance is needed. When the subject is quite a distance away, it’s a good idea to use a reflected-light type meter as it can measure the reflected light from all areas of the setting to the camera.
Older style meters performed simple functions, like measuring ambient light. But newer models are far more advanced and are able to read quick pulses of light that are emitted from electronic flash units. A meter sends arbitrary light value units which are known as exposure value (EV).
This value is sent to a calculator dial which gives you the proper combination of shutter speed and aperture. The shutter speed will be a fixed value with flash-reading meters. Other types of meters often feature the calculator dial and galvanometer movement in the same function.