What are the effects of adjusting aperture, exposure time, and ISO sensitivity in a digital camera?

Aperture size, exposure time, and ISO sensitivity all have different uses. In addition to adjusting the amount of light entering, the aperture can also control the depth of field of the photo. Exposure time (speed) is mainly used to adjust the time of light entry, and plays a greater role in sports photography. ISO sensitivity is used to adjust the photosensitive ability of the photosensitive chip. In poor light conditions, increasing the sensitivity can idealize the values ??of the exposure parameters (aperture and speed) (such as reducing the aperture to increase the depth of field, or increasing the speed). , shoot dynamic scenery). However, the increase in ISO sensitivity may easily cause noise in the photos, so you must pay extra attention during use.

Therefore, in the actual photo-taking process, aperture, speed, and ISO sensitivity must be used correctly and flexibly in order to achieve satisfactory results.