How to take a good photo with a camera

1. Press the shutter slowly and steadily. Although the shutter is "fast", it still takes time to complete the autofocus of digital cameras. This autofocus process is like a colleague's eyes staring at a nearby book and newspaper and suddenly looking up at a distant scene. The eyes need to be adjusted. Only after the correct focusing is completed can a clear picture be obtained. Another key to get a clear picture is to press the shutter stably to minimize the image blur caused by camera shake.

2. When shooting with hand, set the appropriate shutter speed. It is generally believed that the shutter speed should not be lower than the reciprocal of the focal length value. For example, when shooting with a lens with a focal length of 100MM, the shutter speed should not be lower than1100 seconds. In practical use, for inexperienced people, I generally suggest using a high-speed shutter as much as possible to minimize the impact of camera shake on shooting. If you shoot in program mode, I often recommend people who have no shooting experience to shoot in "sports" file. Because in this mode, the camera designer will consider the shutter speed as high as possible.

3. Correct exposure. At present, all kinds of cameras have automatic metering function, and the general problems are not serious. However, it should be noted that when the illumination difference between the subject and the background light is too large (such as backlight photography with the sky as the background), attention should be paid to metering the subject, or some exposures should be corrected appropriately.

4, white balance can generally use "automatic white balance", so as not to affect the true restoration of color.

Questions about ISO.

The ISO standard in digital cameras is actually a standard name from the film industry. In the film industry standard, ISO is the standard to measure the sensitivity of film to light. The lower the value, such as 50 ISO, 64, 100 ISO, it means that the exposure sensing speed of the film is slower than the high value, and the high value ISO refers to the standard exceeding 200, such as 200 ISO and 400 ISO.

The component of the photosensitive part of digital camera is an image sensor, and ISO standard is also used to measure the sensitivity to light. And like film sensitivity, the greater the ISO value, the more obvious the graininess of the final image. The graininess in the photos taken by digital cameras is more superficial, which is usually called digital noise.

But the biggest difference between the image sensor in digital camera and traditional film is that the ISO sensing value of the sensor can be changed. Most digital cameras allow users to adjust the ISO value setting. For films, to obtain different ISO values, it is necessary to use films that do not use ISO standards. After increasing the ISO value of CCD, digital camera can get better shooting effect by increasing shutter and reducing aperture.