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Question: Some help with Depth of Field!?
I have a Nixon P80 digital camera!. I'm a little confused about aperture, and shutter speed settings!. I want to take a picture with a blurred background and the subject in focus!. Any help!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:
Set your camera to Aperture Priority (Av) and select the widest (lowest f number) aperture you can, the camera will select the relevant shutter speed!.

There are just two things that effect DOF, Magnification and Aperture!.

Anything that increases magnification such as using a telephoto lens or just moving closer to your subject will shorten DOF!.

Likewise using the widest aperture will give you the shortest DOF your camera/lens combination is capable of!.

Combining the two and using a fast (wide aperture) telephoto lens used close to the subject with the aperture wide open will give the least DOF of all, so even fairly close background objects will be out of focus!.

You have to watch exactly where your camera is focusing (which is why they have multiple focus points) if its a portrait make sure the eyes are the centre of focus!.


Its going to be tough to do, yes as others have said you want to set the lens to its widest aperature for the most shallow depth of field but with a point and shoot the small sensor size also comes into play making it tough to get good bokeh That does not mean do not try, you will get the most shallow depth of field with the lens at its greatest zoom with the widest aperature and try to put the background a ways away!. Remember with depth of field 1/3 of the area in focus is in front of the focus point and 2/3 is behind it!.

Good luckWww@QuestionHome@Com

If you camera has a manual setting then it is easy!. You will need to set the light reading so you have a fast shutter speed which in turn means you have a low aperture!. In other words you would want say 1/500 of a sec and f5!.6 rather than 1/60 and f11!. The bigger the aperture number the more in focus the overall photo is!. The smaller the number the less!.

If you camera is auto only then it is a little tougher as the camera makes all of the exposure decisions!.

Hope that helps!.Www@QuestionHome@Com

So, here's the simple answer to your question: Looking through the viewfinder, focus on the part of the subject that you want sharp and adjust the Aperture (f stop) to give the depth of field (see below) you want!. If you are using Aperture Priority mode, the camera will set the shutter speed!. Check what it is; motion in the image or hand holding will require faster shutter speeds!. In aperture priority you will have to adjust the ISO to change the shutter speed!. That's the recipe!. For understanding, read on!. Understanding makes for better images!.

Depth of field (DOF) is the distance from the closest objects to the most distant objects that are acceptably sharp in the image!. That's the simple answer; actually, it's rather complicated!. DOF is determined by the aperture (physical opening) of the lens!. Aperture (A) has a relationship to the focal length of the lens that is expressed as the f stop!. It also has a relationship to other characteristics of the lens, which is why, at the same f stop, a medium format lens does not have the same DOF as a 35 mm lens!. To make it more complicated, DOF is greatest when A is smallest!. Has to do with the optics of the lens and something called the circle of confusion!.

There is NO relationship between shutter speed (S) and DOF!. Exposure is the amount of light that is required to record an image on film or silicone!. Exposure (E) can be expressed as E=SxA, that is, the larger the lens opening, the shorter the shutter speed to get the same exposure!. It's made more complicated because f is related to focal length divided by aperture, FL/A!. For a given focal length, a larger aperture gives a smaller f stop!.

Required exposure is related to the sensitivity (ISO) of the film or sensor!. The more sensitive, the less exposure required to record the image!. So the photographer has to take all three, S, f and ISO into account when making an image!. Which one is most important relates to what you want the image to be!.

So, if you are not totally bored or swamped, check out the links below!. To be a good photographer it's important to understand this!.Www@QuestionHome@Com

If you're able to set the aperture you need, use the lowest number for a blurred fore and background!. You will have to adjust the shutter speed higher or lower, depending on your ISO setting!. The lower the number of the aperture, the less depth of field!. The higher the aperture number, the greater the depth of field!.Www@QuestionHome@Com

a great exercise for depth of field!.!.!.this is old school

take a subject that has a distinct foreground , background, and mid- ground!.!.!.such as a fence or line of rail cars or objects strategically placed

focus on each in turn and shoot it by bracketing one above and below the proper settings adjust your settings for each shot and you will see the difference in your depth of field!.!.!.!.

what you are trying to do is done by using a slower shutter speed and panning on your subjectWww@QuestionHome@Com