Explanation of photography terms: sensitivity (ISO) aperture CCD standard lens focal length pixels

1. When the light is insufficient and you need to increase the brightness, you can increase the brightness by increasing the sensitivity.

2. Aperture refers to the several blades inside the lens. The "circle" formed restricts the entry of light. The larger the aperture, the brighter the picture.

3. CCD, a sensor, consumes more power and is more expensive than CMOS sensors

4 , Standard lens refers to a lens with a focal length of 50mm on a film camera or in a full-frame format

5. Focal length is a measurement of the concentration or divergence of light in an optical system. It refers to the distance from the center of the lens to the point where the light is gathered. focus distance. It is also the distance from the center of the lens to the imaging plane such as the film or CCD in a camera. Optical systems with short focal lengths have a better ability to gather light than optical systems with long focal lengths. Simply put, the focal length is the distance from the focus to the apex of the mirror.

6, pixels. After magnifying the picture countless times, you will find that it is composed of many small squares, which are pixels

7. Depth of field. Depth of field refers to the distance range of objects measured in front of the camera lens or other imager along the axis of the imager that can obtain a clear image. The larger the aperture, the smaller the depth of field; the smaller the aperture, the larger the depth of field; the longer the focal length of the lens, the smaller the depth of field; the shorter the focal length, the larger the depth of field; the further the distance, the larger the depth of field; the closer the distance, the smaller the depth of field.

8. White balance is a very important concept in the field of television photography. It can solve a series of problems in color restoration and tone processing. White balance is produced with the reproduction of true colors in electronic images. White balance was applied earlier in the field of professional photography. Now it is also widely used in home electronic products (home video cameras, digital cameras). However, the development of technology makes white balance adjustment It is becoming simpler and easier, but many users still do not understand the working principle of white balance, and there are many misunderstandings in their understanding. It enables the camera image to accurately reflect the color condition of the subject, including manual white balance and automatic white balance. Many people will encounter such problems when shooting with digital cameras: images shot in a room with fluorescent lights will appear green, scenes shot under indoor tungsten lights will appear yellowish, and images shot in the shadow of sunlight will appear. The photos I received are inexplicably bluish, and the reason lies in the "white balance" setting.

There are too many "vernacular" words here. It is recommended to search these words on Baidu Encyclopedia. The concepts are easy to understand