Depth of Field by Studio 3 Images

When looking at an image, it is important to make the subject stand out so you know what is important in the image.  You can achieve this by applying a couple different techniques, but the most common one is using depth of field to make your subject stand out.  Depth of field is the distance between the closest and farthest objects in a photo that appear acceptably sharp. Your camera can only focus sharply at one point. But the transition from sharp to blurry is gradual.  When you incorporate a shallow depth of field in an image, it causes the background to become "blurry" and gives the effect of having the subject jump out at you in the portrait.  Creating an image using depth of field techniques can make you stand out as a professional because it shows that you know what you are doing and are a 'thinking photographer'. If you cautiously think about the camera settings, lens choice and where you are in relation to the subject, it will only make you a better professional.



Depth of field is controlled by 3 things:

Aperture-defines the size of the opening in the lens that can be adjusted to control the amount of light reaching the sensor. The size of the aperture is measured in F-stop.  A low F-stop can create a more blurry background and a high F-stop can create a sharper background.

Focal Length-is the distance between the point of convergence (typically a point located within the lens) and the sensor when the subject is in focus.  A longer focal length (70-200mm) will cause the background to be more out of focus rather than a wide focal length (16-35mm).

Distance from Subject-The closer you are to the subject the more dramatic the depth of field is between your subject and the background.


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What photographic topic would you like to learn more about?  Next week, tune in to learn about why lighting is important and how to execute.


Written by Studio 3 Images (Andrew)