To explore the secrets of the depth of field
Maybe you can take along with the background of aesthetic works, canvas prints new zealand but in addition to the large aperture, you can rely on what to do background blur? How to adjust the size of the depth of field? Is there a link between image formats with the depth of field? Don’t worry, here’s everything you want to know about the depth of field knowledge!
What is the depth of field?
In addition to the composition, cheap printing auckland control depth of field is photographing the people is the most commonly used technique. But many new haven’t studied photography system like curious, what is the depth of field? In short, the depth of field is images can present the clear picture of the scope. Clear scope of scenery is called within the scope of the depth of field, is blurred scope of scenery is outside the scope of the depth of field.
“Why do I need to know the depth of field?
Because of the depth of field control will directly affect artistic effect of pictures you taken. To tell the truth, in addition to the composition and the use of light, your grip on the picture can only be achieved through the depth of field. Most of the time you have to decide is to highlight the subject with background blur, or make all clear pictures. The foundation of all of these is you have a deep understanding about the depth of field. A very simple example, we often can see flowers, insects, such as photographs, the background was very vague (referred to as a shallow depth of field) to highlight the main body. But in the group photos, scenery while waiting for the photos we need the background taken as clear as the subject (called a large depth of field). If you do not know, then your pictures will not only lack artistic quality, but also can be very inappropriate, such as when the group photo shoot with a shallow depth of field, only to shoot well in the first row of the object.
When you say big aperture do you refers to the F value?
No, the larger the F value, the smaller aperture. Aperture is used to control into the body through the lens inside the photosensitive surface light, is a very important index for camera parameters. It depends on the size of the light through the lens into the sensor. Aperture size we are represented by F value, of which, F = the diameter of the lens focal length/effective aperture lenses. As speaking, ten percent 20% in 20 large apertures refers to the relatively small numerical aperture, such as f / 2.8, f / 1.4, numerical % 20 small aperture is bigger, such as 16, f/f / 22. At last the way, if possible, the smallest aperture control within the f / 16. Avoid using f / 20 or 22% 22% small aperture of f / 32 limit because of the lens optical properties, use extreme small aperture diffraction phenomenon, greatly reducing the imaging quality of lens.
Will 20 % camera type and the size of the picture affect the depth of field?
This is a very controversial topic, many people cannot understand 20% the depth of field will have an impact with camera format. Most people would think “full-frame % 20% 20 draw a shallow depth of field effect than APS – C” is a kind of the wrong cognition, but it is not.
We might as well imagine % 20: full-frame camera and APS – C format camera under the same aperture shooting the same composition of picture often require more % 20 long focal length, depth of field to natural light. It is also a “full format than 20% % 20 aps – C format cameras in the scene depth” right to explain this sentence.
Three elements which affect depth of field:
Although you have adjusted the aperture, but through the optical viewfinder see you will always be the camera under the maximum aperture effect. Because in when viewed through the optical viewfinder, in order to be able to display the bright screen, lens is always to be open to maximum aperture, no matter how you adjust the aperture, see is always under the maximum aperture of the depth of field. In order to get to see the actual depth of field, the camera provides a depth of field preview button. Press the button, the camera will the aperture shrink to the size of the selected, see the scene effect and filming the scene after close. , of course, a more convenient way is through the camera’s live view function, under the live view, you can actually see the picture is what you can get the final after pressing the shutter image effect. Of course, you can actually take a few pieces and then judging by the playback effect of depth of field.
Depth of field using techniques in common scenarios:
01 scenery photography
To urban landscape, natural landscape, it is best to use when we filmed in large depth of field that all images are visible. Do you need to use a short focal length with a small aperture (% 20% 20 is best f / 16 or so), a third place to focus on a picture. Consider using a small aperture, you can use camera tripod stability or add the ISO to increase the shutter speed.
02 portrait photography
The portrait of both animals and people, taken the key to success lies in background blur effect! S Within sharp focus, soft-focus blur background, the effect often requires combination of large aperture telephoto lens to shoot out. Of course, not as long as possible, recommend the use of 85-135 – mm focal length combining about F4 aperture.
03 macro close-up
Macro feature is a kind of very special subjects, metal prints often require very shallow depth of field to highlight the effect. But you will find that even with the biggest aperture telephoto with f / 2.8 is difficult to achieve. Why is that? Because you near enough! This is the charm of macro lens, it can be the object distance very close to creates a very shallow depth of field.