Does the lens have scratches that affect imaging?

Severe lens scratches have no effect on sharpness, but the contrast will decrease slightly and the anti-glare performance may be affected.

Because every scratch on the mirror will scatter the incident light, the whole damaged surface will form a diffuse reflection plate, just like suffering from "initial cataract" will inevitably affect the "vision" of the lens. But this picture quality can be ignored in some cases.

Sharpness:

Contrast:

From the above picture, the difference of background exposure can be clearly seen, and the background on the left picture is obviously dark, indicating that the coating damage has affected the light entering the lens to some extent. In addition, by careful comparison, we can find that the shadow part of the left image is bright and the highlight part is dark, and the overall resolution is not as good as that of the right image. Of course, these slight differences can be compensated and corrected by later or even in-machine adjustment.

Extended data:

Skills to be mastered in news photography;

1. Photography angle

It is also a photographic picture, which will produce completely different effects due to different shooting angles [3]. Therefore, in the process of news shooting, we must grasp the snapshot from the perspective of photography. The shooting angle directly affects whether the subject is prominent or not.

In any case, we must firmly grasp the subject of shooting, grasp the camera in the ever-changing rotation of the camera, and fully consider the picture composition of the whole photography and the perfect light of the best exposure on the spot, so as to do a good job in shaping the whole photographic work.

2. Photography height

The height of photography has an important influence on news photography. The same subject matter, different shooting heights, expressing different emotions. For example, in news photography, if you want to praise and highlight the protagonist and show the height and greatness of the protagonist, you need to stand slightly lower than the protagonist to shoot.

In addition, during the Wenchuan earthquake, some news photos on the scene were also taken by photographers standing at different photography heights, giving people a completely different feeling.

Capture composition

Capturing composition is very important in news photography. If you want to take a good photo, you must take a snapshot. When taking a snapshot, you must pay attention to the composition, don't reverse the primary and secondary, treat the subject of news events as secondary, and treat the secondary as the subject of news events, so as not to highlight the theme of news events and make the mistake of not paying attention to primary and secondary.

In terms of composition, we must pay attention to the subject, otherwise the primary and secondary composition will be reversed and the primary and secondary composition will be unknown. When shooting a composition, the use of light is a way to highlight the subject. At the scene of news events, either strong light or weak light is used to highlight the uniqueness of the subject.

4. Timing of shooting

The so-called shooting time refers to the time for news photographers to shoot news pictures, that is, the time to press the shutter and click to finalize the photographic works. The shutter can't be pressed early, and it can't be reached late.

Only when news photographers are afraid of the blending of scenes and profound meanings, can they press the shutter purposefully, so that people can have room for daydreaming and leave the impression of unlimited taste. Only in this way is the best shooting opportunity.

Photographic exposure

If a carefully shot photographic work is underexposed or overexposed, it will seriously affect the effect of the photographic work and fail to meet the requirements of the photographer. This can be said to be the final check on a perfect masterpiece. If the inspection fails, the news photo will eventually be destroyed. Therefore, as a photojournalist, we must master the skills of shooting exposure.

Objectively speaking, the exposure of news shooting is influenced by many factors, such as the light of the news scene, the background design in the later period and so on. Although the camera level is getting higher and higher now, the exposure under strong light and weak light conditions can not reach high technology. Therefore, news photographers must strictly control exposure, comprehensively weigh various factors and properly control exposure.

Baidu encyclopedia-camera lens

People's network-on several skills that news photography should master