A light meter is a necessary device to measure the quantity of light entering a photographic lens. In photography, a light meter usually is utilised to decide the correct exposure level for a picture. Thus, light meters help determine the exposure of a subject by the quantity and quality of light that enters a camera’s lens. There are two types of light meters: digital and analog.
Digital light meters are increasingly becoming popular among modern photographers. They are extremely user friendly and can be easily programmed for automatic measurements of light, taking just a few seconds. In addition, digital light meters provide more convenient readings than the old-style mechanical Lux meter. With the Lux method, photographers had to use a separate meter for each light meter. The photographer had to remember one meter for each light source and keep the separate meters for different light sources for each scene.
Digital light meters have additional features like an auto-exposure meter, white balance auto-exposure meter, continuous shooting, manual exposure meter, and image stabilisation. These additional features enable the photographer to take great photographs with good results. The first Luxometer was invented in 1902 by Wilhelm Achmen, who invented the light meter. The first digital Lux was designed to help military and naval personnel calculate the distance between two locations using stars as navigation lights. The main problem with the standard Lux meter was that it could not determine the proper light exposure. Modern Lux meter has eliminated this problem, making it easier for the photographer to obtain the proper exposure.
The most commonly used light meter for professional photographers is the Digital Multiscan Opto-electronic meter, or DMAX meter. It uses a built-in computer to compute the necessary light exposure settings and determine the correct value for the shutter speed, measured in fractions of a second. The DMAX performs better than any other light meter in the same class and can store more information, allowing it to calculate more accurate light intensity measurements and shutter speed values. The maximum and minimum measurements are also computed, so the photographer will determine which measurements are too low or too high.
Another popular type of light meter for professional photographers is the meter based on the principle of optical glass. It works exactly like the Lux meter, but it is based on the principle of light meters, which only measure the focal length without considering the focus radius. With the help of the focal length measured with the DMAX, the camera determines the focus radius and thus the necessary shutter speed. Professional photographers are very fond of this kind of light meter because they know that focusing the lens and not the camera is much more important in obtaining the proper exposure.
There are also many advantages and disadvantages associated with both digital and optical light metering systems. Digital light metering systems have more sophisticated methods of calculating light meter readings, and they are usually easier to use than the Lux Meters. However, they are more prone to error, especially when the subject is small or has low light circumstances.
Most people prefer using the manual meter when working on their cameras because they do not need a light meter with complicated calculations. Instead, they rely on the correct focal length for their purpose and the proper settings for the exposure. But if they accidentally change the aperture and the shutter speed without thinking, their photos may be blown. It is why a lot of photographers tend to use handheld meters instead of computer-based ones.
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