What's the reason for the blur of digital photos? Pray for the great gods.

Beginners of photography know that in order to take clear photos, they must generally do the following: use a higher speed shutter to reduce the aperture from the maximum aperture by four levels; There should be a lot of light shining on the subject, and the subject should remain still; Hold the tripod steady, press the shutter gently and so on. However, even after paying attention to these, many experienced photographers still feel that the photos taken are not clear enough. Some photographers also believe that the most difficult thing to grasp when taking dynamic photos is the clarity of the photos. If you take a batch of photos with unique composition, correct exposure and true theme, but only the images are blurred, it will be disappointing. If you don't pay attention to check the reason, this phenomenon may appear again. Photographers who are new to digital cameras often encounter blurred images, which are caused by many reasons, the most important of which are inaccurate focusing, unstable camera control, improper exposure combination selection and so on. If you develop photos with your own negatives or slides, you should check them immediately to see if they are clear. People often think that blurred photos are the fault of the printer. There is something wrong with his machine, and the blurred photos are made of perfect negatives or slides. The second thing to look at is the back lens of the lens. We usually attach great importance to the front lens of the camera, which is correct. But sometimes, when changing the lens, we accidentally left tiny fingerprints or stains on the imperceptible rear lens. If the camera and lens remain intact and the blur still exists, an unfortunate conclusion will be drawn: it must be the photographer's own problem. Anyway, if the problem lies with yourself, what is the problem? Here are several simple and quick inspection methods to help you find out the causes of such problems. Blurred photos themselves can provide clues. What you need to determine is the cause of ambiguity-sometimes by analyzing the types of ambiguity with a good magnifying glass. Focusing error If the camera is not properly focused, it will blur the scene you shot and dim the surrounding area of strong light. In addition, if you take a photo of an object with a certain depth (such as a person's head), you may focus on a plane (such as two eyes) and find it unclear. So are other parts of the image (such as nose or ears) clearer? If the answer is yes, then your focus is right or wrong. If the camera focusing system is out of alignment, the camera must be repaired. If the focusing system is in good condition, it may be that you are too careless in focusing, otherwise you should use some optical instruments to correct your glasses or viewfinder eyepiece. Don't boast that you have good eyesight and can see fleas in the distance. Put the viewing screen 3 feet or a little closer to you so that you can see it more clearly. If you have astigmatism or other visual problems, you must get close to see the viewing screen clearly. In that case, you need to see an ophthalmologist instead of an optical shop. Optical shops sell glasses, and ophthalmologists will give you a comprehensive examination of your eyes. Motion blur in photos, if some scenes are blurred, especially some parts that form a certain angle look more obvious, then focusing is not the main reason, but the movement. If only the subject is fuzzy, and the subject is some living, swaying (such as trees or flowers swinging in the field) or moving objects (such as airplanes and cars), then this fuzzy phenomenon is caused by the movement of the subject. Don't think that you can catch a moving object with a speed of1125 seconds as some tables say. Unless you use a high-speed flash, it is impossible to shoot a moving object as clearly as a still life. Even if you shoot a moving football player with11000 seconds, the clarity of the enlarged photo is not as good as that of the player standing still. In the future, you will get the effect by shooting moving objects as quickly as possible (you can also switch to faster film). If the whole picture of the photo is the same blur, it is caused by your own movement-or at least the camera has moved. If you use a tripod, it may be that the tripod pin is not fixed properly or is too thin. If you have a camera in your hand, you'd better practice opening the shutter on an empty machine. For a camera with a standard lens, even if it takes1125 seconds, few people hold the camera strictly, but most people can hold the camera 1/30 seconds through practice. A few people can even stabilize the camera at 1/4 seconds. This ability may be stronger on some days than others/and the number of clear photos needs to be calculated by percentage. In blurred photos, if there are two or more reasons at the same time, obviously there will be many difficulties in recognition. You lock the camera on a tripod, take some still life photos, see if you can eliminate the motion of the camera and the subject, and then observe the images obtained in the photos. With the improvement of the quality of photographic equipment, sharpness has become one of the problems that photographers must deal with. This problem can be solved.