Depth of field

I don't really get the meaning of depth of field. Of course I can find the definition of depth of field, but still, I don't know which picture have better depth of field and which image has good depth of field. Any same-setting image that shows good depth of field and bad depth of field will be helpful. ..

Here are a couple of links that may help.

http://en.wikipedia.or​g/wiki/Depth_of_field

http://www.mir.com.my …fototech/htmls/​depth.html

There is no correct DOF for all shots, it depends on what you want to achieve in each image.

In a landscape for instance you would probably want everything in focus from the foreground to the horizon, in which case you will need maximum DOF and select a small aperture (large number, f/11, f/16 etc.)

To isolate a subject against a 'busy' background, such as a portrait of someone you would normally select a shallow DOF (small number, f/2.0, f.2.8, f/3.5 etc.), although it does not follow that all portraits have to have 'blurred' backgrounds, sometimes the background is as important as the main subject - It all depends on the effect you are after, the subject matter, and your own imagination.

Basically, to throw a background out of focus, select a large aperture (which will give you a high shutter speed), to ensure the entire shot appears in focus use a smaller aperture (this could mean using a tripod because the shutter speed could be quite slow).

Virtual Camera
http://www.photonhead.​com/simcam/