1. EV means exposure compensation.

During exposure, it is usually expressed by a combination of shutter speed (T) and aperture value (f). For simplicity, it was once expressed by Light Value (LV) and uniformly expressed by EV. EV is the abbreviation of English Exposure Values, which is a quantity that reflects the amount of exposure.

Its initial definition is: when the sensitivity is ISO 100, the aperture coefficient is F1, and the exposure time is 1 second, the exposure is defined as 0, and the exposure is reduced by one stop (the shutter time is reduced by half or the aperture is narrowed) First gear), the EV value increases by 1.

2. ISO is the sensitivity of CCD.

Sensitivity, also known as ISO value, is a measure of the sensitivity of a film to light. It is determined by sensitivity measurement and measuring several numerical values. It has recently been standardized by the International Organization for Standardization. For less sensitive films, a longer exposure time is required to achieve the same image as a more sensitive film, so it is often called a slow film.

The highly sensitive film is therefore called a fast film. Whether it is digital or film photography, using a higher sensitivity to reduce exposure time usually results in lower image quality (due to coarser film grain or higher image noise or other factors).

3. S refers to shutter, that is, speed.

The shutter is the mechanism used by the camera to control the effective exposure time of the photosensitive film. It is an important part of the camera. Its structure, form and function are an important factor in measuring the quality of the camera. Generally speaking, the larger the shutter time range, the better. The low seconds are suitable for photographing moving objects. A certain camera emphasizes that the shutter can be as fast as 1/16000 seconds, making it easy to capture fast-moving targets.

However, when you want to take pictures of busy traffic at night, the shutter time must be extended, and the silky water effect in common photos must be taken with a slow shutter speed.

4. WB refers to white balance.

White balance, literally means the balance of white. White balance is an indicator that describes the accuracy of the white color produced by mixing the three primary colors of red, green, and blue in a monitor. White balance is a very important concept in the field of television photography, through which a series of problems in color reproduction and tone processing can be solved. White balance was developed with the reproduction of true colors in electronic images. It was applied earlier in the field of professional photography. Extended information

Everyone knows that the photo background of professional SLR cameras is large, and the photos taken can be magnified to tens or even hundreds of times, while the photo background of mobile phone cameras is small, and the photos taken can be magnified several times. It is easy to blur when the light is poor, especially when shooting night scenes or backlighting. Problems such as underexposure or overexposure, heavy smearing, and loss of details are even more troublesome.

1. Lower the ISO and use a longer shutter time to get more light.

2. Use a camera with a large pixel sensor (large photo background) to get more light.

In fact, both methods are designed to allow the camera to obtain more light and capture more details under the same light. It is very difficult to maintain stability when shooting handheld with a slow shutter speed, so a mobile phone camera with a larger pixel sensor is a better choice.

Baidu Encyclopedia-ISO

Baidu Encyclopedia-EV value

Baidu Encyclopedia-Shutter

Baidu Encyclopedia-White Balance