Darren Smith Photography's photographic tutorials are aimed to teach anyone interested in photography the basics in how to operate their camera and what to consider when you move beyond taking "snaps".
This video is all about the focal length of a camera lens and how it affects your photographs.
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Hello and welcome to the Darren Smith photography tutorials.
This video is all about the focal length of a lens.
One of the most significant properties of any lens is its focal length, in simple terms it represents how "zoomed in" you are with your camera but to be precise it is the measurement of where the light converges inside the lens barrel to form a sharp image on your sensor, so it is a distance and measured in millimetres
Each lens you use will show its focal length on its barrel, such as this example of an 18 to 55 millimetre kit lens, this focal length suggests it's very useful for everyday photography as the focal length increases the physical length of the lens
Typically increasing to the focal length is key to the angle of view obtained the longer the focal length the narrower at the angle of view and the more magnified the image is as the focal length increases the amount of the subject that is in focus decreases, this is known as depth of field
This makes taking a sharp image a little more difficult, but it does allow the background to become progressively more out-of-focus enhancing the subject in the photograph
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