The difference between traditional camera and SLR

1. The production process is different: traditional cameras use silver salt photographic material that film as a carrier, after shooting the film to be developed to get the photo, after shooting can not know the photo shooting effect is good or bad, and can not be deleted on the shooting of bad photos. Instead of using film, digital cameras use a charge-coupled device (CCD) element to sense light and then convert the light signal into an electrical signal, which is then converted to analog/digital and recorded on a memory card, which can be used repeatedly. As the photos taken by the digital camera are digitized and then stored, the photos taken can be played back to see the effect, and the unsatisfactory `photos can be deleted and retaken immediately. After shooting the digital camera connected to the computer, you can easily transfer photos to the computer and a variety of image processing, production of Web pages or direct printouts, which is the main difference between digital cameras and traditional cameras.

2. The shooting effect is different: the traditional camera's silver halide film can capture continuous tone and color, while the digital camera CCD element in the darker or brighter light will lose some of the details, more importantly, the digital camera CCD element of the image captured by the pixel is much smaller than the pixels of the traditional camera to capture the image. Generally speaking, the resolution of traditional 35mm film is 2,500 lines per inch, which is equivalent to 18 million pixels or even higher, while the best CCDs used in current digital cameras can only reach 10 million pixels. At this stage, digital camera photos, whether in terms of image clarity, texture, level, color saturation, etc., can not be compared with the traditional camera photos. But the rapid development of digital cameras R & D space is still very large, I believe that in a few years there will be a significant development.

3. Shooting speed is different: Before pressing the shutter, the digital camera to adjust the aperture, change the shutter speed, check the autofocus, open the flash and other operations, when the photo is taken, the digital camera to shoot the photo image compression and storage, these need to wait for a few seconds, so the shooting speed of the digital camera, especially the continuous shooting speed can not reach professional photography, but Nikon's newly launched new camera can not be used to take pictures, but it can not be used to take pictures. Requirements, but Nikon's new D1 has reached 1/16000 seconds of the fastest shutter speed, indicating that the digital camera technology has exceeded the traditional camera.

4. Different storage media: digital camera images are stored digitally on magnetic media, while traditional camera images are recorded chemically on silver halide film. The current digital camera storage media are mainly SM card, CF card, XD card, SD card, MMC card, SONY memory stick and IBM small hard disk. Storage capacity of 32M, 64M, 128M, 256M or higher, the current IBM small hard disk can easily reach 1GB. 64M memory card, for example, when the resolution of 1280 * 960 in the case of roughly 80 pictures can be stored, if in the case of low resolution storage of hundreds of pictures is no problem.

5. Input and output methods are different: digital camera images can be directly input into the computer, after processing the printout or direct production of web pages, convenient and fast. Traditional camera images must be developed in the darkroom, to be processed through the scanner must be scanned into the computer, and the quality of the scanned image will inevitably be affected by the accuracy of the scanner. So even if it is a high quality original, after scanning the image is far worse. The digital equivalent of all the moments of nature can be easily photographed for the computer to directly process the digital image, if connected to the VIDEO out end can be displayed on the TV.