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Can you take a photo with a hazy background?

Many of my friends have asked me: you can shoot very hazy background photo you actually “very hazy background” is now referred to as “? Depth of Field ” (Depth of Field). The correct description of the background is hazy: shallow depth of field. The background is clear, which means that the depth of field is very deep. The depth of field has a direct relationship with the depth and depth of the aperture:

The larger the aperture, the shallower the depth of field (to make the background very blurred), the
smaller the aperture, the deeper the depth of field (to make the background very clear)

Let’s take a look at the following three pictures:

F / 8 (small aperture)

F / 8 (small aperture)

Aperture f / 5.6 (medium aperture)

Aperture f / 5.6 (medium aperture)

F / 2.8 (large aperture)

F / 2.8 (large aperture)

First, let’s look at the aperture value. What the beginners are confused about is the aperture value. How can it be obvious that f / 8 is a “small aperture” and f / 2.8 is a “large aperture”? I wo n’t elaborate on the technical things, in short:

The larger the value, the smaller the aperture. The smaller the
value, the larger the aperture.

In the above 3 pictures, we can see that the focus point is the face in the upper left corner. The smaller the aperture (f / 8, remember that the larger the number is, the smaller the aperture), the clearer the face behind; , Remember that the number is small and the aperture is large), the more hazy the face behind. Another point is that the focus position also affects the position of the depth of field. If the focus point of the phase f / 2.8 is the second face, the first, third and fourth faces will become hazy, and the focus The face will stay clear.

When is the aperture / depth of field used?

This is not absolute, it depends on your needs. But usually landscape photos use deep depth of field (to make the entire landscape clear and sharp), while portrait photos use shallow depth of field (to make people stand out in the photo). But once again, landscape photos can also be created with shallow depth of field, and portrait photos can also be used with deep depth of field, so which depth of field is used depends entirely on the requirements.

Finally, I will post two pictures for everyone to enjoy!

The above picture has a small aperture and a deep depth of field . The portrait below has a large aperture and shallow depth of field .

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Author: Alex Tam