Traditional Culture Encyclopedia - Photography major - What is the trapezoid in ipad photography?

What is the trapezoid in ipad photography?

Hello, this is because your Ipad lens is dirty, and then moire fringes will appear, which will be layered like waves.

Solution: Wipe with a clean paper towel, and then avoid direct sunlight on the lens, which can reduce the travel probability of moire. I hope my answer can help you, thank you. .....