Shoot the effect of background blur

Shoot the effect of background blur

In the face of a chaotic background, we often think of blurring the background to create a relatively simple and clean background, www.customcanvasonline.com.au so that our subject will be more prominent. So, how do you make a background blur? In fact, background blurring is to control the depth of field within a relatively shallow range, so that the subject is within the depth of field, so that the subject will be shot very clearly, while the background is outside the depth of field, so it will become relatively blurry and blurry. Therefore, in order to achieve the shooting effect of background blur, we need to control the size of several elements to obtain the shallow depth of field. There are three main factors related to shallow depth of field, namely aperture, focal length and shooting distance. The shooting effect of background blur can be obtained by controlling the size of these three factors.

1. large aperture and background blur

The effect of the aperture on the depth of field depends on the aperture.

The larger the aperture (the smaller the aperture value, such as F2.8), the shallower the depth of field and the blurred background;

The smaller the aperture (the larger the aperture, e.g. F11), the greater the depth of field and the clearer the background.

Therefore, to achieve the effect of background blur, the most convenient and practical way to operate is to open the aperture wide. For example, we usually shoot portraits with a wide aperture.

2.Long focal length and background blur

The effect of focal length on depth of field depends on the length of focal length.

The longer the focal length (e.g. 200mm), the shallower the depth of field and the blurred background;

The wider the focal length (e.g. 24mm), the greater the depth of field and the clearer the background.

Therefore, to get the effect of blurring the background, you can lengthen the focal length of the zoom lens, which can zoom in and zoom in on the subject and blur the chaotic background.

Shoot the effect of background blur

3. Close-up shooting and background blur

The effect of shooting distance on depth of field is related to the shooting distance.

The closer the shooting distance (such as shooting macro), the shallower the depth of field and the blurred background;

The farther the distance (e.g. a distant mountain), the greater the depth of field and the clearer the background.

Therefore, to achieve the effect of blurring the background, we can make the lens as close to the subject as possible, so that the subject is within the depth of field, while the background becomes blurry outside the depth of field, which is similar to the effect of a long focal shot with a shallow depth of field.

conclusion

To sum up, to control the depth of field, it is necessary to adjust the size of the aperture, the length of the focal length and the distance of the shooting.

How to shoot the background blur? A wide aperture, a long focal length, floating frame canvas and a close shot all serve the purpose of achieving a shallow depth of field, which, if met, results in an extremely shallow depth of field. I hope this article will be helpful to you. I hope you can share more experiences and tips. Please add, discuss, share and follow.

16th Oct 2020

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