TTL (Through-the-Lens) metering is a camera feature that measures the light passing directly through the lens to determine the correct exposure. This method ensures that the exposure calculation accounts for any filters, lens attachments, or other factors that might affect the amount of light reaching the sensor or film.
Photographers rely on TTL metering for accurate and consistent exposures in a variety of lighting conditions. Understanding TTL metering allows for precise control over brightness, contrast, and image quality, making it an essential tool for both professional and enthusiast photographers.