Simple articles like this are easy reading and can make a great difference to your photography.

How to use a lens hood should be photography 101, yet I’ve met serious amateurs and enthusiasts, good photographers to be honest, who didn’t really know why a lens hood should be used or when to take it off. So let’s make things clear on that one. Lens hoods, those plastic weird-looking things that go on the front of your lens, come in all shapes and sizes. Typically they used to be supplied only with expensive lenses, but today even the most basic

Source: Lens Hoods – Why, When, and How to Use Them

Lens Hoods – Why, When, and How to Use Them