Traditional Culture Encyclopedia - Photography major - I am a photographer. Why are there shadows in all four corners of the photo?

I am a photographer. Why are there shadows in all four corners of the photo?

This is because when you shoot with a SLR, you use the wide-angle end of the zoom lens or the wide-angle lens without taking off the lens hood, which will happen (the four corners shadow caused by the hood).

When using the wide-angle end of the zoom lens, take care to remove the hood.