in a photo when there is a spot in focus and the rest isn't is this done as the photo is taken or afterwards

Question

is it a setting on the camera or is it done using a computer programme once the photo has been uploaded? thanks

Answer 1

Wikipedia does pretty well on the subject of depth-of-field.

See: http://en.wikipedia.org/wiki/Depth_of_field

Answer 2

this question was asked just a few hours ago, and it is a very important technique for a professional photographer.

use a F-stop lower than 5.6

I dont know how much you know about photography, but if you are used to using the manual setting on a camera then all you need to do is adjust your F-stop so that you are using an apature like 2.8, 3.2 and so on up to 5.6. The smaller the number the more blurry the background will be.


Using a large zoom lens is a trick to imitate the technique i laid out. If your lens does not have an apature that i listed you can zoom all the way in with a large zoom lens and it will do a OK job of giving you blur in the background.
Source(s):

http://flickr.com/photos/thejokker/

Answer 3

You can do it both ways. This is referred to as depth of field. It happens when the opening which lets light into the camera is relatively large. Then everything at a particular distance from the camera will be in focus, and things farther away from this distance (near or far) will be more out of focus. If you have a really small opening then almost all of it will be in focus (like a pinhole camera).
Of course programs can do this with blurring as well.

Answer 4

Depth of field?? that means anything that is the same distance as the subject from the lens will be in sharp focus!! The correct way to do this is with a lens filter which is clear in the center, and is frosted outward. Cokin makes these for both amateur and professional cameras. They work just fine with digital cameras and i use them with video cameras as well. just try "adusting" a video camera for depth of field.

Answer 5

Traditionally, this has been done in the camera by shooting with a "fast" lens, with the aperture wide open. This produces a shallow depth of field, allowing for the subject to be in sharp focus, while everything else is out of focus.

Answer 6

You can achieve this effect by opening up the aperture to get a shallow depth of field or you can blur parts of the photo post-fact using Photoshop or Paint Shop Pro.

Answer 7

Its just the camera focus, if its a digital camera it will autofocus, if you are doing it manually just make sure when you are adjusting the lense it looks the way you want it to. No computer program involved, although you could, but thats lame

Answer 8

No computer program can harm the photo quality by uploading

Answer 9

CAN BE DONE BOTH WAYS; DURING SHOOTING OR AFTERWARD WITH EDITING PROGRAM LIKE PHOTOSHOP.