{"id":18060,"date":"2021-12-19T15:00:37","date_gmt":"2021-12-19T15:00:37","guid":{"rendered":"https:\/\/intiaudiovisual.com\/depth-of-field\/"},"modified":"2023-05-22T17:52:24","modified_gmt":"2023-05-22T17:52:24","slug":"depth-of-field","status":"publish","type":"post","link":"https:\/\/intiaudiovisual.com\/en\/depth-of-field\/","title":{"rendered":"Depth of Field – What is it? What is it for? How to modify it?"},"content":{"rendered":"\n
What is Depth of Field?<\/h2>\n\n\n\n
Depth of field<\/strong> is the distance that appears acceptably sharp between objects in a photo or a frame<\/strong> of a movie, that is, it is the distance that appears in focus. The camera can only focus sharply on one point.<\/strong> The distance containing that point will be called the depth of field.<\/strong><\/p>\n\n\n\n
An image with little depth<\/strong> will be one that contains a very small distance<\/strong> sharply focused.<\/p>\n\n\n\n
An image with a lot of depth<\/strong> will be one that contains a very wide distance<\/strong> sharply focused.<\/p>\n\n\n\n
Below we leave you some images to more easily understand this concept.<\/p>\n\n\n\n<\/figure>\n\n\n\n
How to achieve depth of field in photography?<\/h2>\n\n\n\n
The depth of field in photography is determined by two main factors; Focal length<\/strong> and aperture<\/strong>.<\/p>\n\n\n\n
Focal length<\/h3>\n\n\n\n
The focal length<\/strong> (usually represented in millimeters<\/strong>) refers to the general description of a lens. Lenses are photographic lenses.<\/p>\n\n\n\n
It is not a measure of length but refers to a calculation<\/strong>. This calculation is the optical distance<\/strong>, that is, the distance between the point where the light rays converge<\/strong> to the camera sensor.<\/strong><\/p>\n\n\n\n
The focal length tells us the angle of view<\/strong>, that is, what part will be captured and how large the individual elements will be. The longer<\/strong> the focal length<\/strong>, the less<\/strong> part of the scene will be captured<\/strong> and the larger<\/strong> the individual elements will be. On the contrary, the smaller the focal length<\/strong>, the less enlargement<\/strong> the elements will have and the greater part of the scene will be captured.<\/strong> <\/p>\n\n\n\n
Once the focal length is understood, we can explain how it affects the depth of field:<\/strong><\/p>\n\n\n\n
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The smaller the focal length, the greater the depth<\/strong>, that is, the less magnification, the more sharp distance we will capture.<\/li>\n\n\n\n
The larger the focal length, the less depth of field,<\/strong> that is, the less we capture of the scene, the less sharp distance we will get.<\/li>\n<\/ul>\n\n\n\n
Knowing how the focal length affects the depth of field, we can use the lenses and their focal lengths to change the depth,<\/strong> for example; if we want to have a very sharp image, that is, with a very wide focal length, we will use a lens with a very small focal length such as a wide angle. However, if what we want is to reduce the depth, we will change the lens to one with a very wide focal length such as a telephoto lens.<\/p>\n\n\n\n<\/figure>\n\n\n\n