What does ev stand for in the camera? The answer is exposure parameters. What does ev stand for in the camera? The answer is exposure parameters. The EV value of a camera is an exposure parameter and a reference value to measure the exposure of the camera. It reflects the combination of aperture size and shutter speed, and is also related to the brightness of the scene and film sensitivity. When the EV value and the luminous flux provided by the lens match the EV value required for photometry, the correct exposure in the mathematical sense can be realized. Every increase in EV value of 1.0 is equivalent to doubling the light input; Every decrease in EV value of 1.0 is equivalent to a doubling of light input. During shooting, when some subjects are too bright or too dark, EV may be used for adjustment. Exposure compensation means that the photographer corrects and adjusts the exposure "amount" determined by camera photometry, so as to get accurate exposure suitable for the correct performance of the subject. Submission: ev in Yan Gang camera stands for exposure value. It reflects the combination of aperture size and shutter speed. The EV value is also related to the brightness of the scene and the sensitivity of the film. Generally speaking, the faster the film sensitivity, the brighter the subject and the larger the EV value, so it is necessary to use a small aperture and rapid exposure. Exposure compensation means that the photographer corrects and adjusts the exposure "amount" determined by camera photometry, so as to get accurate exposure suitable for the correct performance of the subject. The exposure compensation is expressed by +3, +2,+1, 0,-1, -2, -3, etc. "+"means to increase the exposure based on the exposure determined by photometry, "-"means to decrease the exposure, and the corresponding number is the series (EV) of compensation exposure.