The depth of field is a photographic view that the area described in a framework that is strong. Although only a single adjustment layer optical image can be in real home, and some different goals can be a much larger area in focus. You can change the depth of field on the opening of the lens, the lens focal length or distance.
An academic approach DOF would talk about things likeCircle of confusion and hyperfocal distance. For practical purposes, but do not need to be written on these subjects for advanced effects DOF in your photos.
There is no reason to depth "good" or "bad." Depending on the subject and your artistic vision, you can use a wide DOF for some pictures and a very narrow DOF for others. If you have a portrait you can use a shallow DOF, so that only the person's face is hot. If you take a frontshooting from three-quarters of a car, you can have a great depth of field, so that everything seems to be taking the tack sharp rear bumper grill.
There are three ways to control depth of field:
1: You can move further or closer to the subject.
2: You can use the lens focal length.
3: You can change the aperture of the objective of a larger or smaller.
Take a careful examination of these methods.
The depth varies as you move closer oraway from the subject. If you have already done with a macro lens close-up, you probably noticed that a topic of focus, while everything else has been dramatic emphasis. Since the target was very close to the object, the image shows a very shallow depth of field.
The same effect, although less pronounced occurs when a record of each subject. Focal length is a more specific topic, the apparent depth of field you will seethe resulting photograph. DOF does not expect to see a big difference when you are moving significantly slower. When you take something in the distance, such as Big Ben or the Grand Canyon, it is likely that the whole subject is in focus, because the subject was far off target.
The second way to handle DOF is reduced by changing the lens focal length. The wide-angle tend to exaggerate the apparent depth of field, while the telephoto lenses usuallyprovide indications on the ground. The result is that almost everything tends to occur in order to focus a wide angle. In contrast, a telephoto lens lets you isolate the subject from the background and foreground.
As I said earlier, the focal length to choose what you try to start the slideshow. Suppose we take a group of people sitting around a table. Your goal is to get all the attention so that a wide angle lensthe best choice.
On the other hand, maybe you're shooting a craftsman who works in his cluttered workshop. It is possible to isolate selective attention to the man in the background. A long lens, only man development indicators, and the rest of the image dissolves into a blur.
Many zoom lenses, both wide angle and telephoto settings. This means that the depth of field generated by a long zoom varies by theme.
L 'last chance DOF control system. openings larger lens (smaller f-values) to create panels with depth of field. smaller apertures in order to create more depth of field. consider what happens when you try to be a sign that read too far away. Most people suspect that the eye opening is smaller and the sign of a greater focus.
The camera works exactly the same way. When you open the aperture to let more light throughDOF, the lens is flatter. Judgement of the lens of a small f / stop and DOF is lower so that more attention and the image is
Now you understand the concept behind the depth of field, how to use that knowledge to improve your photos. I have already discussed how to select a suitable period of convergence to a particular topic. But the options available DOF are much more complex. great photographers learn to manipulate DOFcreate photo stop.
Isolate an object from the context, by a bullet or a ship of war always produces interesting topics. Most photographers choose to shoot architectural themes with a wide angle, because the focal length allows them to acquire the entire building, while standing near her. To qualify for the shallow DOF, but could be blocks of several kilometers and shoot with a telephoto lens and separates it from other nearby structures.
Ifthe subject require many different elements to be in focus, you now know that you can achieve that result by either moving farther away, switching to a wide angle lens or selecting a smaller aperture. Naturally you can combine all these techniques to increase the DOF even further.
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