Angle of View
Angle of View is the amount of a scene a photograph captures and can be measured vertically, horizontally or diagonally. Also known as angle of coverage or field of view, angle of view changes given the type of lens a photographer uses to take a picture.
While wide-angle lens tend to capture more of a scene than any other lenses, longer lenses generally get about two degrees of a scene within their angle of view.
The further away an image that a photographer is attempting to capture within their angle of view, the longer and more narrow the lens should be. For instance, a picture of the stars or far-off marine life would be taken with a longer, narrower lens than one that has an image with an angle of view that is twenty feet away. Similarly, if a photographer wants to include more or less light within an angle of view, they can use a petal or a hooded lens respectively.
Whether you are a novice or expert photographer, changing the angle of view of a scene can add a fresh, unique spin to a traditional picture. Rather than shooting a photo straight on, as is the traditional method, a lowered or slanted angle of view may give your pictures an unconventional flare.