Question about Cameras
"Depth Of Field" (or DOF) is the amount of distance both in front and behind the point of focus that is also in focus. If there is a very short distance or range of an area that is in focus, it is said to have a shallow depth of field. This shallow DOF is achieved by setting the aperture or "f stop" to the wider or lower number settings. The smallest f stop number will provide the shallowest DOF. The DOF will become broader ir deeper with each increasing f stop setting.
Shallow DOF settings are often used in portraits where the background is desired to be blurred. It is also used in macro (extreme close up) photography, and anywhere a blurred foreground / background is desired.
The down side of this is that the shutter speed will increase proportionately, to maintain a properly exposed image. If you are trying to convey a sense of motion - by allowing the subject to be blurred slightly - you'll have some trouble due to the fast shutter speed. Neutral density filters fixed to the lens can correct this. The other side of the coin is in an indoor and evening outdoor photography. If you're not using a flash, you'll likely have to be shooting more towards the "open end" of the lens (more towards the lower number aperture settings) which while allowing enough light for an good exposure - will also reduce the DOF. Some people or objects in front of and behind the focus point will not be a sharp as a result.
The best thing to do is experiment. set a number of object on a surface - 2', 3' 4' 5' and 6' away from the camera. A tripod or other solid surface can help a great deal. Set the camera up for a "normal" exposure in a full manual or Aperture Priority Mode of the middle object 4 feet away. Take a picture. Next, open the aperture (make the number smaller) and adjust the shutter (if in manual) to expose properly again. Take the picture. Keep doing this both BOTH directions for the aperture from the first "Normal" exposure. Compare the results to see exactly how the DOF changes. Tinker with shutter speeds - or don't change them. Notice that with each time you open the f stop, the shutter must speed up to compensate for more light entering the camera due to the wider aperture setting (and vice versa).
I hope I understood your question correctly and that this helped.
Posted on Oct 11, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 27, 2013 | Canon GL1 Mini DV Digital Camcorder
on Jun 23, 2011 | Cameras
on Jan 08, 2011 | Sony Cyber-shot DSC-W50 Digital Camera
May 01, 2012 | FUJIFILM FinePix S2950 / S2990 Digital...
Mar 09, 2012 | Nikon N2020 35mm SLR Camera
Jun 21, 2011 | FUJIFILM FinePix S4000 / S4050 Digital...
Dec 30, 2010 | Nikon COOLPIX S8000 Digital Camera
Oct 14, 2010 | Canon Cameras
Jul 01, 2009 | Nikon COOLPIX P90 Digital Camera
91 people viewed this question
Usually answered in minutes!