Provide a paragraph on teaching the use of digital cameras

1.What you call the form of light sensitivity, that is, the imaging form of the camera. Different from the traditional film photosensitive form, there are two core imaging components of digital cameras:

One is the widely used CCD (charge coupling) element; The other is a CMOS (Complementary Metal Oxide Conductor) device.

Generally, ordinary digital cameras use CCD imaging, while SLR cameras generally use CMOS imaging.

2.There is no necessary connection between pixels and entry, such as Nikon's D40, a classic SLR camera, but the effective pixels are only 6 million, but its image quality will not be inferior to the current 10 million ordinary digital cameras.

Generally speaking, more than 5 million pixels are enough to meet the general home shooting requirements.

For example, a 6 million pixel camera, the highest resolution is 3072 2048, which can theoretically be developed into a 20-inch camera.

3.Common camera parameters.

1) Aperture: Aperture is the control of the amount of light that passes through the lens into the photosensitive surface, usually within the lens. Aperture is indicated by an F-number.

The smaller the f-number, the more light will enter in the same unit time, and the amount of light entering the upper stage is just twice that of the next level, for example, the amount of light entering the aperture is doubled when adjusted from f8, and we also say that the aperture is opened one step wider.

2) Shutter: The shutter is a device on the camera that controls the effective time of the photosensor. The longer the shutter time, the longer the ** time, and the longer the shutter time, the brighter the picture with the same other camera parameters.

3) ISO sensitivity: The ISO of a digital camera is achieved by adjusting the sensitivity of the sensor or merging the sensitive points, that is to say, by improving the light sensitivity of the sensor or merging several adjacent sensitive points to achieve the purpose of improving the ISO.

With the same aperture, shutter and fill light conditions: the higher the ISO, the larger and brighter the image**, but the noise increases. Common sensitivity: ISO50 1600, while ordinary digital cameras that exceed ISO400 are very rough.

4.Introductory learning: It is enough to master the three basic parameters of aperture, shutter and sensitivity, and to learn to match these three parameters, you can further understand the fill light, control, composition and so on.

As they said earlier, the second one, pixels are not the standard for distinguishing beginners or professionals.

Nikon, for example, has only 1200W pixels for its professional full-frame D3S, while the new D3100 and D7000 have 1400W and 1600W. Or Canon 1D4, as an APSH model only has 1600W pixels, and the number of pixels ranks first in the latest batch of Canon updated models, 7D, 60D, and 550D all have 1800W pixels. Of course, Sony's machines are very strictly divided according to the number of pixels, and the higher the pixels of the models of the same era, the more high-end the fuselage.

1. Optically, the principle of small hole imaging. (For more details, check it yourself) the lens of the camera can be seen as a small hole as a whole.

2. In traditional cameras, imaging is a chemical reaction, and imaging is carried out through the chemical changes of photosensitive materials. It is currently phased out.

3. Digital camera, imaging can be approximated as a physical reaction, the photosensitive chip can be sensitive to light in a specific state of power supply, and then store the charge information through memory, and then display the image through calculation and decoding.

Digital Camera Usage Skills Disturbance" is a book compiled by Li Jiqiang, Liu Zhao, Li Lingjun, and Cao Zukang, and published by Heilongjiang Science and Technology Publishing House. Key Qi.