A light meter is a device used to measure the amount of light falling on a subject. It is an essential tool for photographers, as it helps them to determine the correct exposure settings for their camera. Light meters can be either handheld or built into the camera itself.
The importance of using a light meter cannot be overstated. By using a light meter, photographers can ensure that their images are correctly exposed, resulting in better quality photographs. In addition, light meters can help photographers to save time and film, as they can avoid taking multiple exposures to get the correct exposure.