Advantages and disadvantages of SLR camera

The advantages and disadvantages of SLR cameras are as follows:

First, the advantages of SLR cameras

The biggest advantage of 1 and SLR is that the same lens is used for framing and imaging, so there is no parallax.

2. SLR camera adopts optical viewfinder, which is closer to what human eyes see.

3. Modern SLR cameras use focal plane shutter, which can get shorter exposure time than mirror shutter.

4. Digital SLR cameras generally use a phase difference autofocus device, which can make the focusing action in one step and the focusing speed is higher than other types of digital cameras.

Second, the shortcomings of SLR cameras

1, SLR cameras use mirrors and pentaprisms, so the structure of SLR cameras is complicated and the cost is high. Moreover, the existence of reflector and pentaprism also leads to the thicker, higher, larger volume and weight of SLR camera body.

2. When the camera shutter is pressed and the mirror bounces up at high speed, there will be mechanical vibration and noise (which can be avoided by the pre-lifting function of the reflector of the SLR). The time interval from pressing the shutter button to starting the focal plane shutter is slightly longer than that of other cameras.

3. The focal plane shutter will change when shooting high-speed moving objects.

Working principle of SLR camera

When shooting in DSLR, press the shutter button, the mirror will pop up, the shutter curtain in front of the photosensitive element (CCD or CMOS) will be opened at the same time, and the light passing through the lens will be projected on the photosensitive element for photosensitive, and then the mirror will immediately return to its original state, and the image can be seen in the viewfinder.

This structure of the single-lens reflex camera ensures that it is shot through the lens, so that the image seen in the viewfinder is always consistent with the image on the film, and its framing range is basically consistent with the actual shooting range, which is very conducive to intuitive framing and composition.

In the SLR system, the unique design of the mirror and prism enables the photographer to directly observe the image passing through the lens from the viewfinder. As can be seen from the structural diagram of a single-lens reflex camera, after the light reaches the reflector through the lens, it is refracted to the focusing screen above and combined into an image. Through the eyepiece and pentaprism, we can see the scenery outside in the observation window.