Why is there a lump on the camera of a professional photographer?

Image quality usually refers to image quality, and one of its common definitions is "the accuracy level of signals collected, processed, stored, compressed, transmitted and displayed by the imaging system" [2] For amateurs, we can loosely understand that the image quality of a camera is equal to the imaging intensity of its sensors.

Because the image quality of the camera is the signal progress level of its sensor, the image quality is an objective and quantifiable thing, not the subjective feeling of the observer. Therefore, good picture quality does not mean that the picture is beautiful and comfortable, and we can't get the picture quality of this camera just by looking at the direct photos. For this reason, some people say that it is very normal to see that micro-single is better than mobile phones. In addition, if you want to say that when you buy a machine, you want the photos taken directly by the camera to look comfortable, then it should be more accurate to say that you want a camera with "good portrait effect" or "good portrait performance".

Although high quality can't directly make the picture look good, it can help you improve the picture in some ways, which is why we pursue high quality cameras.