When we look at the basic principles of photography, one of the key elements has to do with focal length. When describing a lens, this is the first thing that comes to mind and what it is is a bit of a mystery. This article describes what focal length does.
Focal length affects your angle of view and determines how much or little of a scene will be captured. As you zoom in, your angle of view decreases. The subject becomes magnified. Likewise, as you zoom out, more of a scene will be captured, and objects decrease in apparent size.
Simply put, focal length range of a lens affects how much you can zoom in relative to the sensor size of your camera. More on this subject in a future post. Focal length is measured in millimeters — the larger the number, the narrower your angle of view is.
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