How to shoot the night scene of Canon 750d?

This has nothing to do with the 750D. The operation and setting principle of SLR cameras are the same. As long as you know the shooting principle and skills, no matter what camera you use, you can be competent for different shooting situations.

First, the exposure of the camera is controlled by three parameters (shutter, aperture, ISO):

The faster the shutter, the faster the moving object can be photographed, but the darker the picture; Conversely, the slower the shutter, the brighter the picture, but the moving object will be blurred. Generally speaking, photographers need a shutter speed of more than1125 seconds, walkers need a shutter speed of more than 1/250 seconds, runners need a shutter speed of more than 1/600 seconds, and so on.

The larger the aperture, the brighter the picture, but the easier it is to blur the background; On the contrary, the smaller the aperture, the darker the picture, but the clearer the front and back scenery. Usually, you need to open the aperture when shooting portraits with blurred background, and lower the aperture when shooting landscape photos with clear panoramic view. Above F2.8 belongs to large aperture, below F8 belongs to small aperture. The smaller the value, the larger the aperture, and the larger the value, the smaller the aperture. Pay attention when setting. In addition, the aperture of some cheap lenses (such as earphones) is not large enough, and generally it can only be opened to F3.5, so it is difficult to shoot films with blurred background and cope with dark environment.

The larger the ISO, the brighter the picture, but the worse the picture quality; Conversely, the smaller the ISO, the darker the picture, but the best picture quality. Generally, photographers try to keep the ISO value to a minimum to ensure the most delicate picture quality. Unless the environment is so bad that neither the large aperture nor the safety shutter can guarantee the brightness, the ISO will be improved and the image quality will be sacrificed for the brightness.

Any exposure and effect are achieved by adjusting the above three parameters, and the photographer's manual operation mainly revolves around these three parameters. In fact, the camera will automatically adjust these three parameters in the automatic mode, but the automatic adjustment value of the camera is not what the photographer wants (for example, the camera often increases ISO without authorization, resulting in a decline in image quality), so there will be a manual mode (M mode) for the photographer to control himself.

There are two kinds of night shooting, one is portrait night shooting and the other is landscape night shooting. Although they are all night scenes, the shooting methods are quite different because of the different subjects.

Portrait of the night. Because the subject is a person and the person is moving, it usually takes at least1125 seconds for the photographer to be safe, but because the environment is too dark, the shutter will be lower than the safe value to improve the brightness (the lower limit is not lower than the focal length of the lens, for example, 50mm, and the shutter cannot be lower than the focal lengths of 18mm). Others, etc.), when the shutter is slow to a certain extent, the slight movement of people will lead to blur, so it is necessary to use an external flash to assist. When the flash flashes to people, it will solidify the portrait, thus solving the problem of slow shutter. It should be noted that the power of the flash should not be too large, otherwise it will easily expose people; At the same time, you can open the aperture to the maximum and improve the brightness as much as possible. At this time, a large aperture lens is needed (at present, the cheapest large aperture lens is a small spittoon 50/F 1.8 with a few hundred yuan, and other large aperture lenses are more than 2,000 yuan). Under a large aperture, the background is blurred, but because the subject is a person, the blurred background will highlight the subject, so you can use a large aperture; In principle, the smaller the ISO, the better. However, if the shutter and aperture can't provide enough brightness, ISO will be improved. It is suggested that the noise will be more obvious after 800 (although the noise can be seen within 800, it is within the acceptable range and cannot be seen without zooming in). In addition to the above exposure adjustment, the most important thing for night portraits is focusing. Because there is no light on a person's face, it is difficult for the camera to focus. A common trick is to put a luminous body (such as a mobile phone) next to a person's face to help focus, and then take it away. In addition, it is suggested to choose a background with rich street lights instead of a background with few lights.

The scenery at night. Because of the scenery, such as buildings, streets, street lamps and other immobile things, the shutter can be slowed down at will (there is no upper limit), but in order to avoid the blur caused by the camera's own jitter, a tripod or even a cable must be used to release it, which is different from the portrait night scene; In principle, it is to turn down the aperture, which can ensure a wide range of clarity (generally it is better to set it at F8-F 16), but the picture will be darker after turning down the aperture, so the shutter should be set slowly to balance it; In principle, ISO should be set to the lowest level to ensure the finest picture quality, and the darkness brought by low ISO still needs a slower shutter to balance it. In other words, the idea of setting scenery and night scenes focuses on the very slow shutter, which makes the aperture and ISO have a relaxed setting space to ensure clarity and image quality. It should be noted that there is no need to flash the scenery at night. In fact, there is no flash that can illuminate so far, and it is useless to use it. On the contrary, it may cause interference.