Traditional Culture Encyclopedia - Photography major - There is always a fuzzy black spot in the upper left corner of the photo taken by the camera. What is the reason?

There is always a fuzzy black spot in the upper left corner of the photo taken by the camera. What is the reason?

The black spots at the photo fixing place are caused by the dust of the photosensitive element (there will be no black spots when the lens is gray), and the cleaning cost of the card machine is slightly expensive, about 100 yuan. The second reason is poor battery contact, which may be caused by electric shock and dirt. You can clean it with a clean soft cloth or buy a new one. I think the battery life is up. Buying a new product is only a few tens of dollars, which is not very expensive, hehe.