If you have a digital SLR camera you will definitely be able to use this.
If you have a compact digital camera have a look through your manual for "aperture" settings.If you’re not too sure what the aperture is, or does, have a look at
This page concentrates on how the aperture on a camera can be used to control the depth of field.
This page concentrates on how the aperture on a camera can be used to control the depth of field.And once you know how to control it you can use it creatively in your photography.
Depth of field is a measure of how much of a photo is
If you use a compact digital camera.and use it in auto mode, you probably have a “long” depth of field.This means that practically everything in your photo will be in focus.
Manufacturers do this deliberately. It's because this way the focusing ability of the camera can be less precise, and still deliver a sharply focussed photo for you (aren’t they caring!)
So, you might well ask, would we want it any other way? The reason is that the effect can be put to creative use.
Digital SLR cameras are usually more precise with their focussing and enable the photographer to produce a shallow depth of field.
It’s the shallow depth of field that is commonly used by photographers.
Phew! Lots of talk! Time for a photo to demonstrate the effect.:
The key thing about a shallow depth of field is that, because only a small area of the photo is in focus, it concentrates the viewer's eyes on that part of the photo. It isolates the subject from its surroundings.
Why do I want a shallow depth of field (dof)?
Because a shallow dof isolates the subject from its surroundings, it is really useful in portrait photography.
And because a lot of the photos we take are of people, it helps to know how to separate them from the background in this way.
But what about the other photo – f22?
The other photo shows a long dof – pretty much everything in the photo is in focus. This is useful too, for those times when you really do want everything in focus.
Landscape photographers often want to use this effect because they want to get the whole scene in focus – from the flower in the foreground to the mountains in the background.
Some landscape photographers go even further and use a technique called hyper focussing. This is a method of getting even more of your photo in focus. It’s too complex to throw in here – it’s something for another page!
What are all those f’s for?
If you’ve already read my page explaining aperture you’ll be ahead of the curve here.
The aperture is the hole that helps control the amount of light that hits a digital camera’s sensor. The f numbers are a way of describing how open of closed that hole is.
A smaller f number indicates a large hole, and a larger number indicates a smaller hole (confusing, isn’t it!).
Apart from controlling the light, the aperture also affects the dof.
Go back to those photos above. The camera lens in the bottom right shows how large or small the aperture was when the photo was taken.
When the aperture is wide open – f1.8 – we get a shallow dof. And when the aperture is closed – f22 – we get a long dof.
So, if you want to use your aperture creatively, get practicing with your aperture, and start controlling your depth of field!
What is aperture? Aperture is the opening size in the lens when a photograph is taken.
When you press the shutter release button on your camera, the lense will open up a hole that permits the camera’s image sensor to briefly catch the scene you want to capture. The hole size will depend on the aperture which you set. If the hole is larger, then the more light will get in, and if the hole is smaller, the less light will get in.
Aperture is measured using ‘f-stops’. Refer to the picture above. The ‘f-stops’ measurement can be from f/1.2 to f/22. As you can see, the smaller the f/number, the bigger the hole is, and the bigger the f/number, the smaller the hole is. If you move from one f/stop to the next, you will double or half the opening size of the hole in your lens. Also bear in mind, that if you change you shutter speed from one stop to another, you will also double or half the opening size of the hole in your lens. This means if you decrease your shutter speed and increase your aperture, you will let equal amount of light into your lense. For example, if you use this setting f/2.8 and 125; the amount of light that gets in is also equal to this setting f/2.5 and 160.
If you are a new photographer, you might be confused about the numbering system of the aperture where large apertures were given smaller f/stop numbers. As for smaller apertures, they were given bigger f/stops numbers. The numbering system seems to be the wrong way around, however, you will get use to it.
good luck and I hope can help.... :)
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