Choosing the right focus point is very important for a new photographer. If the focus point is incorrect, not only can you not take the photos you want, but also hinder the progress of photography technology, in this article I will demonstrate the relationship between focus point and the depth of field. I will also analyze the effect of the focus point in the photo at different positions.
The Relationship between Focus Point and Depth of Field
When taking a photo, the focus area must be clear, the front and back of the focus point will be affected by the depth of field, especially when the three elements that match the shallow depth of field, the further the object from the focus point, The deeper the depth of field will be, and the more blurred it will be. Let us look at these following examples:
(Example 1) Flowers in the Center, the Foreground and Background are Blurred
(Example 2) The Focus is on the Foreground, the Foreground is clear, and the Background is Blurred
(Example 3) Focus on the Background, the Foreground is Blurred, and use the Foreground as a Frame for Composition
It can be seen that when we select the focus point, we can make a shallow depth of field effect on the foreground and background scenes, making the foreground or/and background blurred. Of course, the larger the aperture or the longer the focal length, the shallow depth of field effect will be more obvious.
With a wide-angle lens, the shallow depth of field is not obvious ↓
Using a telephoto lens, the depth of field has much more shallow ↓
The theory is theoretical, and you may not know the actual operation after reading it. Now let’s take a look at some practical application examples!
Practical Application Examples
Let’s take a look at the panorama first. We used a wide-angle lens (16mm), with a small aperture (f / 16), focus the focus point in the middle of the photo (on the near hillside), so that the entire photo will also be within the depth of field and clear.
So how can you shoot in this environment? Let’s change the composition, focus point, and aperture, and find some interesting things to shoot!
(Shot 1) Focus on the Distant View
With the slightly larger apertures f/4 and f/2.8, we can focus on the hillside from a distance, so that we can blur the branches and grass in the foreground and make the scenery in focus more prominent.
Note that sometimes we don’t need to overshadow the prospect, otherwise the reader may not know what that is!
(Shot 2) Focus on the Close Shot
Find out what is interesting in the environment, and then use the large aperture (f/2.8) to focus on the subject (small flowers) and use a shallow depth of field to blur the background and highlight the subject.