Lens Hood - Cause of Lens Flare

Cause of Lens Flare

Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background The light source itself may be in the lens' angle of view, but it doesn't have to be to to cause a lens flare. It is only necessary that stray light from the bright light source enter the lens.