Urgent! (The correct combination of aperture and shutter forms the correct exposure)

The criterion of the best combination of shutter speed and aperture is the criterion of choosing aperture (F value) and lens aperture. The maximum aperture of 50 mm f/2 lens is suitable for obtaining sufficient exposure in dim light conditions, such as on-site lighting. Have the smallest depth of field. For imaging technicians, it is the worst f/2 of the lens, and the maximum aperture is suitable for getting enough exposure in dim light. The depth of the scene helps to keep the background out of focus, thus focusing on the subject. The maximum aperture of f/2.8 is two to three, which has the best image quality of this lens. It has a slightly larger depth of field than the above-mentioned larger aperture. Provide a limited range of clear focus, so as to obtain appropriate exposure when the lighting condition is slightly worse than the best condition, such as cloudy weather or in the dark. Compared with f/5.6, F/4 has a medium (medium) depth of field. Suitable for outdoor shooting in the sun. It has excellent image quality. F/8 is one step larger than the minimum aperture and has a large depth of field. Suitable for outdoor shooting in the sun. It has excellent image quality. The smallest aperture of f/ 1 1 has the largest depth of field, and the loss of clarity is extremely slight (optical reasons). When the maximum depth of field is important, the benefits of increasing the depth of field due to the small aperture obviously outweigh the loss of clarity that is almost imperceptible in value. Shutter speed B door uses a camera bracket (such as a tripod). The opening time of the shutter is controlled by the time when the shutter button is pressed. Suitable for outdoor shooting with small aperture and large depth of field at night. For example, fireworks, lightning ... and record the stripe patterns formed by moving lighting at night (such as running lights). 1 and 1/2 seconds use a camera stand (such as a tripod). Suitable for using small aperture to obtain large depth of field and sufficient exposure (such as spotlight or photographic lamp lighting) in dim light. Suitable for shooting inanimate objects and still objects. Use the camera bracket 1/4 seconds. This is the slowest shutter speed suitable for taking portraits of adults. Under dim light conditions, it is appropriate to use a small aperture to obtain a large depth of field and sufficient exposure. Suitable for stable objects. Use the camera bracket 1/8 seconds. It is more suitable for shooting adults in a limited range than using the shutter speed of 1/4 seconds. Under dim light conditions, it is appropriate to use a small aperture to obtain a large depth of field and sufficient exposure. Suitable for stable objects. 115 seconds to use the camera bracket. When a standard lens or a wide-angle lens is installed on the camera, some people can take pictures with their hands if the camera can be held fairly smoothly during exposure. It is suitable to use a small aperture to obtain a larger depth of field and sufficient exposure in the case of dim light. The shutter speed of 1/30 seconds is the slowest shutter speed recommended when shooting with a hand-held camera equipped with a standard lens or a wide-angle lens. In order to get high-definition photos, the camera must be held very smoothly. This shutter speed is suitable for most live light photography. It is appropriate to use a small aperture in cloudy weather or shadows to obtain a large depth of field. 1/60 seconds shutter speed, suitable for taking pictures in outdoor sunlight such as cloudy days and shadows. This speed is useful for using a small aperture to increase the depth of field. This shutter speed is also used in places with bright spots. With this shutter speed, camera shake and shooting failure are less than with the shutter speed of 1/30 seconds. Flash synchronization for SLR cameras. 1/ 125 seconds This is the best shutter speed for outdoor photos in the sun. Under bright light conditions, using a medium aperture to a small aperture can produce a good depth of field. Using this shutter speed can minimize the weak vibration of the camera itself. You can master some medium-speed movements, such as walking people, children's games or free-moving babies. For hand-held cameras, this speed is safe to some extent when shooting with a medium focal length lens with a focal length less than105 mm. This shutter speed is recommended for some SLR cameras to shoot with flash. 1/250 seconds is suitable for capturing medium-speed sports bodies, such as medium-speed runners, swimmers, cyclists, horses running a certain distance, parades, running children, sailboats, baseball, football players playing at medium speed, etc. When you don't need a large depth of field, but mainly want to grasp the action, you can use this shutter speed in outdoor sunlight to minimize the vibration of the camera. Suitable for hand-held camera with 250mm focal length lens. 1/500 seconds is suitable for capturing fast-moving objects, such as middle-distance athletes, running horses, divers, fast cyclists, running cars or running basketball players. This shutter speed can be used to capture all moving objects except the fastest speed. 1/ 1000 second is the best speed to capture fast moving objects. Such as racing cars, motorcycles, airplanes, speedboats, outdoor and stadium competitions, tennis players, skiers and golfers. Because this shutter speed requires a larger aperture than other shutter speeds, its depth of field is the smallest. This is an excellent shutter speed when a hand-held camera is equipped with a long focal length lens with a focal length less than 400 mm.