What's the difference between a SLR camera and a single lens camera (with eyepiece)?

1, SLR cameras rely on the reflector, and use the reflector and pentagonal mirror to project the image in the lens into the viewfinder, which belongs to the framing of optical structure; However, a single camera has no reflector and viewfinder, and the image in the lens is projected on CMOS, and then CMOS converts the image into a video signal and sends it to the micro LED screen in the viewfinder to achieve the purpose of framing. Simply put, SLR is an optical image projection framing, similar to watching the sports meeting directly, and single electricity is similar to live video, similar to watching the sports meeting live. Therefore, there is a certain delay, that is, slow, in single-electric framing compared with the pure optical framing of SLR. But now the technology is perfect, the delay is only a few milliseconds, and it is not felt at all. However, in sports competitions, news photography and other fields, the disadvantages of single-shot framing will be magnified, which is why journalists still cling to SLR.

Sony A99 still belongs to a SLR rather than a single battery, because A99 has a translucent reflector, but the Wuling lens is cancelled and the optical framing is changed to electronic framing. As mentioned above, the disadvantage of electronic framing is that it is not suitable for capturing photos of rapidly changing scenes such as sports, wars and news events. In addition, due to electronic framing, the color of the framing image displayed by LED is different from the color of the actual scene. In addition, due to the characteristics of LED, in the process of adjusting the aperture shutter, there will be errors in real-time monitoring, which is not as direct as that shown by SLR optical framing. For example, SLR reduces the aperture, so the image in the viewfinder will be correspondingly darkened due to optical framing, which is closer to the final photo effect. For single electricity, it is more direct.

As for image quality, image quality is more than resolution. A color-cast, well-defined photo can't be said to have good picture quality. Good image quality should be a comprehensive standard of color, resolution, excessive details, softness and so on. The clear place is clear enough, and the place that needs to be softened excessively should be softened. If a photo is all clear, there will be no aesthetic interest. Image quality, especially color adjustment, is a big science. Only a few companies such as Canon and Epson can really control color adjustment freely in the industry. Photos are not taken by computers, and later they need to be made into advertisements and printed matter. Canon is dominant in both photography and printing, so Canon's camera is superior to Sony in color adjustment. Many people will say that PS is good in the late color. In fact, this view is right and wrong. If the foundation is not laid in the early stage, the difficulty of adjustment in the later stage will increase accordingly. In addition, professional equipment is needed to realize real color adjustment. Many people take photos of PC changes at home and find that things with completely wrong colors are everywhere. It often happens that things printed by computers with completely different colors look good.

Because of the image quality, due to the size and price, a single battery can't lose to SLR in resolution, CMOS and other hardware, but there is still a long way to go compared with the same type of SLR in color control and image quality control. Take Sony as an example, the processing chips used by single battery and SLR are the same, but the algorithms are completely different, and the final results of different algorithms are definitely different.

2. The difference is whether there is a reflector. Now the difference between cameras is becoming less and less obvious. The biggest criterion to distinguish a single camera from a SLR is whether there is a reflector and whether the flange distance is long or short. The lens flange distance is very short because a single camera has no reflector, and a SLR has a reflector, so the flange distance is very long. The length of flange distance has become a sign that distinguishes a single camera from a SLR.

When optical framing is used for 60 days, the lens separation phase detection method is applied, that is, the light passing through the lens is divided into two beams through the separation lens and focused, and projected onto the ranging module, and whether the focusing is accurate is judged by judging the distance on the photosensitive element array. This ranging component is located above the reflector, which directly splits the light in the five-pointed star, so the focusing speed is very fast. When the focus is displayed on the LCD for 60 days, the mirror will rise and the lens separation phase detection component will be blocked by the mirror. At this time, the light of the lens is directly projected onto CMOS, and there can be no obstruction in the middle, otherwise the image presented on CMOS is incomplete and the picture on LCD is incomplete. Therefore, at this time, the contrast detection method is adopted, that is, the lens moves back and forth for 60 days, and the computing system can find the best focus position according to the contrast of the measured object. The whole process is detected by the main sensor. Firstly, the scene of the lens is converted into an image, and then the contrast is detected on the image. This process has many more links than lens separation phase detection, so it is reasonable to focus slowly. Micro-single now also uses phase detection focusing, but the phase detection focusing of micro-single is still based on CMOS's full participation. Compared with the independent phase detection mechanism of SLR, the efficiency is still not as good as that of SLR, so the micro-single focus is still not as good as that of SLR.