The photos I took with the wide-angle lens are weird. Is it distortion?
This article is from Jiayou Online
When we take pictures of buildings or other objects with a wide-angle lens, we will find that the photos are not the same as what we observe with the naked eye. The most common thing is that the horizontal and vertical buildings have become There are leaning “leaning towers” and situations where people are photographed as “big noses”. Many people now interpret this situation as a “distortion” of the lens. This statement is actually not too accurate.
Usually what we call “distortion” in photography, generally They all refer to the image distortion caused by the inherent characteristics of the lens in the lens. This is what we usually call “barrel distortion” and “pincushion distortion”, and manufacturers will also optimize the design of the lens group and choose high-quality Optical glass and body software are modified to reduce this distortion. Now most manufacturers can control this distortion very well, and there is basically no need to worry too much.
but similar to “leaning tower”, “big nose”, etc. Although it is also called “distortion”, it is actually caused by the perspective relationship. Although some people call this phenomenon perspective distortion, for example, “leaning tower” is called “linear distortion”, but I still don’t like this. Although how to call it is everyone’s freedom, I still hope that everyone is clear that this phenomenon is “distorted” because of the “perspective” relationship. Perspective relationship is a vocabulary that already exists in painting, just like composition, and literally, the word “distortion” is somewhat derogatory. We naturally don’t want distorted photos, but it can be achieved by using this perspective relationship. For example, increasing the sense of depth, adding visual effects, etc. to add to our shooting creation, and if you want to take into account the wide angle of view and the building without distortion, you need to use a shift lens.
For a less rigorous example, if the subject is far away from us, take a picture with a wide angle and a telephoto, and you will find that there is basically nothing in the subject in the two photos “Distortion”, of course, ignoring the influence of other factors such as focal length, is bound to be a little less rigorous, but what I want to express is that it is the perspective relationship rather than the lens difference that affects this effect. If you have to make a simple summary, it is that the image distortion caused by phase difference can be improved by design, but the distortion caused by the perspective relationship is an objective law.
So the picture taken by the wide-angle lens is very strange. This question should be specific A specific analysis of the problem, wide-angle lenses have to take into account the perspective and image quality issues, it is indeed easier to appear barrel distortion at the edge of the picture, such a situation becomes a distortion is no problem. Although situations like “leaning tower” and “big nose” are also called “distortion” by everyone, this situation is caused by the perspective relationship, and I don’t want to say it is “distortion”. Of course, in fact, there is no uniform standard for “distortion”. Distortion that is different from what is observed with the naked eye can also be regarded as “distortion”, so you should call this phenomenon collectively distortion, and there is no problem.
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