What is the difference between a SLR and an ordinary camera?

The difference between SLR digital cameras and ordinary digital cameras

1. Different structures

SLR digital cameras are completely different from the ordinary consumer digital cameras that we have more contact with. The difference between the two systems mentioned here is mainly reflected in the internal structure of the two. Like traditional SLR cameras, they adopt a special structure. Digital SLR cameras fundamentally solve the problem of aberration, that is, what can be seen from inside the viewfinder. is the image that will be exposed on the film. Since ordinary digital cameras adopt the CCD photosensitive mode, what we see on the LCD is the image felt by the CCD. In other words, what the photographer sees on the LCD screen is what we see. There is no aberration problem in the images to be taken, so ordinary digital cameras can also take good macro shots! So from this point of view, SLR cameras have no advantage.

2. Shutter problem

Ordinary digital cameras are sufficient for ordinary users to take photos of this trip, but their shutter speed requires higher requirements to adapt to harsh shooting environments. But it is extremely important for photographers. In ordinary digital cameras, the fastest shutter speed is extremely important, which is maintained at about 1/1000 seconds, while the fastest shutter speed of SLR digital cameras can easily reach about 1/10000 seconds, so The fast shutter speed is beyond the reach of ordinary digital cameras and is very suitable for shooting ecological environments.

3. Different lenses

When it comes to SLR digital cameras, many people will talk about the variety of supported lenses. Some people also think that the biggest difference between SLR digital cameras and ordinary digital cameras is The difference is that one lens is interchangeable and the other is not. This may seem reasonable at first, but it is not true if you think about it carefully. For example, Olympus' E20P is a SLR digital camera with non-interchangeable lenses. Of course, most SLR digital cameras on the market are supported by a supporting lens group. During shooting activities, we can change different special effects lenses, view different special effects through the viewfinder, and finally choose the appropriate lens to try shooting.

SLR digital cameras not only support a wide range of supporting lenses, but more importantly, they also have lens specifications that are beyond the reach of ordinary digital cameras. First of all, as for the shooting effect at the wide-angle end, most ordinary digital cameras stick to the 35mm ~ 38mm position. The lenses of a few high-end models support 28mm wide-angle. However, SLR digital cameras can usually take gratifying wide-angle landscape photos with the original lens. , with a special wide-angle lens, you can even continue to expand the viewing range. Secondly, digital cameras are very sensitive to shake. Even a slight shake during the exposure process will produce blurry photos. If ordinary digital cameras are not high-power zoom lens models, many do not have the practical function of anti-shake, and SLR digital cameras The camera can be equipped with an external lens to prevent the camera from shaking during shooting.

In addition, the lens part is also closely related to the image quality. Comparing the lenses of most ordinary digital cameras and SLR digital cameras, we can see that the lenses of ordinary digital camera lenses are very small and are not proportional to the diameter of the lens barrel. The lenses of some models are only about 1/3 of the diameter of the lens barrel, while the lenses of SLR digital camera lenses are basically the same diameter as the lens barrel, which also results in a huge difference in the optical performance of the two systems. In short, having one more lens to choose from will provide you with more protection when shooting. A good lens can complete the shooting work calmly and comfortably.

4. Difference in area of ??photosensitive materials

Most digital SLR cameras use 2/3 of the full frame as photosensitive material, and a few high-end products achieve the full frame (that is, 35 mm film is the same size) and is often several times larger than the area of ??the CCD used in ordinary digital cameras, so digital SLRs generally have very small noise points, while ordinary digital cameras have much poorer noise control, such as the 800w Canon 20D and 800w The Sony f828 is so different from the noise point control, it is simply incomparable!