What are the advantages and disadvantages of digital cameras compared with traditional film cameras

1. Different media for storing images.

Traditional photography is a chemical recording of image information on the light-sensitive material, once exposed, the effect is basically determined and can not be changed. Digital photography is a digital way to store the image information in the magnetic media recorders, do not need light-sensitive materials, you can watch the effect immediately after the completion of the shooting. If you are satisfied, you can save it, and if you are not satisfied, you can delete it and re-shoot it.

2. Different ways of input and output.

Traditional photographic methods to get the image, you must be in the darkroom chemical treatment, after processing, printing and release. And digital photography does not require chemical treatment of light-sensitive materials in the darkroom, can be directly into the computer for image processing, satisfied with the image can be printed out through the printer.

3. The difficulty of processing the image is different.

Traditional photographic methods to image processing, must be carried out in the darkroom, the technical requirements of the processor is higher, more difficult to deal with, and sometimes leave traces of the operation on the image. Digital photography is processed on the computer, the operation is relatively simple, the processing effect is good, can not see traces of processing.

Digital photography to the camera work has brought a lot of convenience. In the photographic preparation, digital photography is more simple than traditional photography. Digital photography only need to prepare a digital camera, memory cards, flash, batteries, chargers, etc., such as: a high-capacity memory card can be tens of film, and can be reused, which solves a large number of film problems, while the traditional photography of the camera, film, flash, tripod, shutter release line, filters and other objects are essential to prepare for the work is more cumbersome to carry a large amount of items in the photographic The actual operation of the camera is more troublesome. The shortcomings of the digital camera power consumption, battery versatility is poor, once there is no electricity, will not be able to carry out the work, therefore, according to the need to bring enough batteries, while the traditional camera power consumption is not strong, the battery versatility is strong, to reduce the worries in this regard, however, things are discriminatory, there are advantages and limitations at the same time, on the comparison of digital photography and traditional photography to make some discussion.

1 Comparison of digital and traditional camera performance

1.1 Comparison of image quality

The main difference between digital and traditional cameras is in the imaging method. Digital imaging through the CCD image sensor, and through the binary digital composition of the image. CCD is a semiconductor device, which contains the number of units of the device determines the quality of digital camera imaging, that is, the pixel. The more units, the higher the pixel value, the better the image quality. The number of pixels in a digital camera determines the quality of the image, i.e. pixels. With the continuous upgrading of CCDs, the pixels of digital cameras are generally in the range of 2 to 12 million. Traditional cameras use silver halide film for shooting, the image quality is based on the number of resolution per inch as an indicator, generally used sensitivity of 100 film is equivalent to the digital camera image 20 megapixels above the level. On the other hand, in the use of silver halide film to shoot scenes, its color and tone width than the CCD element, CCD element in the brighter or darker light will lose some of the details. Therefore, when using the camera to shoot, digital camera pictures in the image quality, texture, color saturation can not be comparable to traditional cameras. Therefore, some professional photographers, in the use of digital camera shooting, mainly to take advantage of its instantaneous display function, the digital camera as a "sketchbook" to use, the first digital camera to record the contents of the shot, and then through the back of the digital camera on the LCD screen to check the shooting of the resulting picture composition, lighting, color. If the image is unsatisfactory, adjustments will be made to obtain the best picture quality. After all the adjustments have been made, the traditional camera is used to shoot the content. Therefore, the digital camera in some professional photography is to play a role in supporting the role of traditional cameras, is not possible to replace the traditional camera.

1.2 Comparison of picture storage

The storage capacity of the digital camera is relatively large, the digital photo collection will be uniformly converted to JPG or TIF format, this form of storage in the mobile hard disk, CD-ROM burning, digital companion and other carriers, and film does not need to rely on any carrier can be saved, the storage of film is better than the digital picture, the advantages of this is mainly reflected in the following Security and easy to change the two aspects of the difference. Digital photos have security problems. Some equipment failures or computer viruses will affect the security of the photo, often because of these failures so that the image can not be reproduced, while the film through the processing, to the negative and the form of photo presentation, under normal circumstances, is not easy to damage, loss, and its security is higher than that of digital photographs. Digital photos have easy to modify. Computer modification of the pictures taken by the digital camera is very easy, on the one hand, through the Photo shop and other software on the picture of the transfer of wood, a variety of processing, synthesis of the picture. This easy modification of the image of the picture image of the authenticity of important issues, often this change makes people can not be sure of the real existence of the image, but also can not judge the real shooting standards of the photographer. On the other hand, the use of computers to change the picture at the same time will also change the image quality of the picture to some extent, affecting the re-use of the photo.

1.3 Comparison of Lens Focal Lengths

The stated focal length of the lens on a digital camera is different from that of a conventional 135 camera, which replaces film with a CCD, an optoelectronic sensing component. 135 cameras have an image area equal to the film's photographic sensitivity (36 × 24 mm), whereas the image area of a digital camera varies depending on the size of the CCD sensor used, and for a conventional camera with the same lens focal length, the image area of a digital camera varies depending on the size of the CCD sensor used. For traditional cameras equipped with the same lens focal length, most digital cameras have a smaller imaging area and a narrower angle of view of the lens. For example, 50mm standard lens mounted on a digital SLR camera, its actual focal length is generally 70mm-80mm, so that some of the use of the lens has changed, the wide-angle lens mounted on a digital SLR camera becomes a small wide-angle lens, if you need to use a wide-angle lens when shooting a unique perspective, it must be mounted on the front of the digital SLR camera with an ultra-wide-angle lens. Once the content of the performance needs to be expressed with a super wide-angle lens, the digital camera can not meet the needs of the shooter.

2 Advantages of Digital Photography

2.1 Fast and Efficient

Digital cameras are very fast in acquiring the final successful image, and the LCD screen displays the captured image after the shutter is pressed, and the photographer can play back the observation and choose to store, delete, or transmit the image immediately based on the quality of the image and the size of the memory card. In contrast, the traditional camera shooting after the film development, selection, photo printing to obtain the final image, the photographer only saw the developed film or photos to know whether they have completed the shooting task. Now professional digital cameras can support Bluetooth wireless technology to transmit image images, we can directly wire or wireless input computer for digital processing or transmission, saving time, easy to produce.

2.2 image quality

Digital camera images directly into the computer, as opposed to the traditional image (negative, positive) after scanning the image quality is high, reducing the loss of images in the middle of the process.

2.3 Convenient Adjustment

The adjustment of sensitivity and white balance of digital cameras is very convenient compared to traditional cameras. Digital cameras have a wide range of sensitivity, and its photoelectric sensor (CCD, SCCD, CMOS) also has its own acceptance of light floating range, and can be converted to the traditional film sensitivity value, that is, in the shooting process at any time to change the sensitivity to adapt to the different scene light. The white balance of the digital camera can be adjusted to a variety of different color temperature environments, as opposed to traditional photography, daylight-type, light-type film and different color temperature conversion filters, greatly facilitating the shooter.

2.4 Low cost

Digital image acquisition by the memory card instead of film, the traditional camera using a roll of film can shoot 36 images, and a small memory card can store hundreds of digital images, from the silver salt image to the digital image, the storage medium and storage changes have greatly improved the image storage capacity. Computer software applications to replace the potion printing, computer display instead of developing photos, reuse of digital products instead of disposable photographic materials and potions, digital images directly after computer processing for layout printing, etc. have minimized the cost of photography.

2.5 Safe and Reliable

The storage and search of digital image data captured by digital cameras is very easy, it can be stored on CD-ROMs or computer hard disks, which not only takes up little space, but also takes much longer than the storage of film and photographs, and the quality of the digital image will not be altered because of the long storage time.

3 Disadvantages of digital photography

The growing popularity and development of digital photography and digital image processing software technology has brought great convenience, but also negative impact on the development of photography.

(1) From the current situation of photography, over-emphasis on digital processing technology or over-reliance on image processing software has led to a regression in the artistry and ideology of photography itself, resulting in falsehoods and shallowness.

(2) Shooting more is not necessarily better. After picking up a digital camera and putting down the economic burden of film and processing costs, people's hobby is to let go and shoot wildly, but "it is better not to shoot in January than not to think for a day", and the superiority of the conditions has created a lazy mind.

(3) The progress of digital image processing technology also provides a more convenient and fast tool for some bad intention to make false photos, which leads to the loss of information morality.

(4) There is still a gap between digital cameras and traditional film cameras in terms of the ability to enlarge larger images, digital cameras may stop working in some extreme environments, and digital cameras are still more expensive.

4 The development of digital photography

In this territory of photography, digital photography and traditional photography to compete for a period of time, but we all feel that digital photography is gradually crowded and replace the camp of traditional photography, as is the case now with color photography and black and white photography. In the future, the proportion of traditional photography will gradually weaken, silver salt photos slowly become less, but can not be completely replaced, the true essence of the process will certainly be retained, and let people always miss and appreciate digital photography, although the technology to bring a lot of convenience, but we must wake up to realize that the human factor is always the first place. The high quality of professional images not only rely on technology, but also rely more on humanities, concepts, thinking and comprehensive scientific knowledge. Therefore, there is no need to blindly pursue a variety of image processing software version of the high and low, beware of excessive image computer effects. In the rapid development of digital equipment and digital technology, we should not be at a loss, the cultural value of photography lies in the expression of human aesthetic interests, emotions, ideals and concepts. Therefore, in the process of advancing human civilization, we use our shocking works to move people, inspire people, bring aesthetic needs and pleasure to human life, but also continue to change people's lives and thinking, so that mankind toward a more civilized tomorrow, is the most noble ideals and pursuits of our photographers.