What are the main features of digital photography compared to traditional photography?

Conventional photography uses a silver-salt photographic material (i.e. film) as the carrier, and the film has to be developed to obtain the photographs, and there is no way of knowing how good or bad the capture was during the process, and it is not possible to delete the captured photographs.

For digital photography, optical image capture utilizes the principle of small-aperture imaging to convert the optical image projected onto it into digital information that can be recorded on a storage medium (CF card, SD card).

The image can be generated into a standard bitmap image format and modified with the help of bitmap image retouching software such as Photoshop, and output as a physical photograph by digital printing or printer, or can be displayed directly on a monitor, projector, electronic photo album, and other display tools, or can be converted directly into various applicable formats for web publishing or e-mail transmission.

So compared with traditional photography, the main features of digital photography are:

1. Immediately after taking the picture, you can see the picture, thus providing the possibility of unsatisfactory works immediately retake, reducing the occurrence of regret.

2. You only have to pay for those photos you want to develop, and other unwanted photos can be deleted.

3. Color reproduction and color range are no longer dependent on the quality of the film.

4. Sensitivity is also no longer fixed by film. The photoconverter chip provides a wide range of sensitivities and options.

How to use a digital camera:

1. When shooting, the camera should be held squarely. In the shooting of portraits, buildings, the camera lens can not be too tilted, over-tilted or tilted left and right, otherwise it will make the subject of the big up and down or small up and down, or make the scene of the horizontal to deviate from the horizon, so that the scene has a sense of east to west.

2. When shooting, the camera should be held steady. Otherwise it will make the image appear double shadow or blurred. Hold press the shutter not too hard, especially in the 1/30 second below more attention to stability. You should press the first spring gently like pulling the trigger when shooting, and then press the second spring in time to seize the moment. 1/15 second or less, it is best to use a tripod, or the camera will be attached to a fixed object to shoot.

3. When using the self-timer, dial gently. Do not dial it back hard without pressing the shutter, or you will easily damage the spring and gears of the self-timer.

4. In the use of curtain-type, compact camera, pay special attention to the protection of the curtain, do not touch with your fingers vigorously, especially can not let the sharp things to break the curtain.

5. Camera lens can not be long to the sun, to prevent light leakage. Especially the curtain shutter camera, because the role of sunlight focusing, easy to burn the curtain.

6. Set the shutter speed, can not be set in the middle of the two adjacent speed. Camera speed dial on each scale, there is a small hole or a small slot, must be dialed in place, in order to operate properly, pointing between the two speed, not only do not get the accurate speed, and easy to damage the shutter. The number of aperture levels, you can refer to between two levels of aperture factor.

7. In the use of small cameras, it is best to get into the habit of adjusting the speed dial after the first film, some small cameras are not allowed to set the speed before the film.

8. After the use of the camera, you must check the shutter and self-timer equipment is relaxed, because the shutter structure of the core components are springs, spring tension for too long, easy to make the elasticity weakened, affecting the accuracy of the shutter speed.

Baidu Encyclopedia-Digital Photography