Is digital photography shooting?

At the product launch of Windows Vista and Office2007, two words "digital lifestyle" were written on the big screen. I think in these short years, our lifestyle is really different from before. The digital lifestyle has brought unprecedented convenience and fun to people.

Among them, the influence of digital photography on people's daily life and entertainment should be the biggest and most revolutionary. The powerful functions and convenience of digital cameras are incomparable to those of film cameras, and they cannot be realized by film cameras. Looking back now, it is difficult to understand how people took pictures at that time and how they learned to take pictures. Needless to say, some practical technologies have emerged in recent years, such as optical image stabilization and smiling shutter, and even the most basic functional requirements of photography are very difficult for film cameras.

The three basic elements of photography are: framing, exposure and focusing. Now imagine how the cameras of that era adjusted these three factors.

Take a picture. Most film cameras take pictures through a separate frame. The problem caused by this is that what the human eye sees is not the same as what the lens sees. There is a deviation, and this deviation is obvious. Only expensive SLR cameras can avoid this problem, and the contents of the viewfinder of SLR cameras are seen through the lens.

Exposure. How much exposure can be adjusted by aperture and shutter. The adjustment of aperture and shutter should be the essence of photography. It is not only used to adjust the brightness of photos, but also can get ideal results according to the needs of taking photos. For example, shooting moving objects needs to speed up the shutter, and shooting landscapes or portraits needs to adjust the depth of field through the aperture. For SLR cameras, you can adjust the aperture and shutter very freely. However, the amount of light entering the screen is not equal to the amount of light entering during exposure. Besides, the sensitivity of human eyes and film can't be exactly the same. Idiot cameras have separate metering devices. In fact, the fool camera mainly adjusts the aperture and shutter automatically. However, only the overall brightness of the environment can be detected, and fixed-point metering cannot be realized. It is also impossible to adjust the aperture and shutter according to the shooting needs.

Focus. Anyone who has studied junior high school physics knows the importance of focusing for taking pictures. SLR cameras can naturally be adjusted manually, but in fact it is very difficult to adjust manually when the light is dark. Stupid cameras are harder to focus. Most of them have a fixed focal length and take pictures according to the depth of field. More advanced camera can measure the distance by ultrasonic wave or infrared ray.

In addition, there are some very practical and basic functions that film cameras are difficult to achieve. Such as white balance and continuous shooting. Digital cameras also need special high-speed memory to realize continuous shooting. If you use film to shoot continuously, the film will rotate quickly in the camera ... what will it look like?

Many functions of film camera can not be realized, mainly because it is a non-intelligent mechanical equipment. The camera doesn't know what it is shooting or how it works. However, digital cameras can adjust and control mechanical devices with actual photos. When you shoot, you can see what you shot and how it works.

Different storage media can not only shoot and watch in real time, but also be reused. And the storage capacity is not a level at all. Not only does it achieve zero shooting cost, but it is also more environmentally friendly. The chemicals used in film and film printing will pollute the environment.

In the movie era, I dare not expect to record every beautiful moment with a camera. However, digital photography technology has really been realized. Our lifestyle has really become a digital lifestyle.

Film and television genius: Xiao Song