The previous article in this four part series on how to move your P-DSLR told what your camera bag it the light mode when using the program in P, o, and the combinations of shutter speeds and apertures different kind may amount of that income in the same light reaching the sensor digital SLR. This article explains how to choose the best combination of aperture and shutter speed. It also leads to the ISO, you can vary the sensitivityYour DSLR sensor.
Imagine two very different scenes, you want to photograph: her son was determined in the mountains, against a backdrop of beautiful scenery and your daughter is dancing at a party, a disturbing background of chairs and tables behind her.
DSLR
In the picture of your child, the mountains are behind sharp, while the photo of your daughter, it interfering background blur.
What is your camera assumptions about the importance of the background in P mode, you canTo decide if the background out of focus? The camera usually has no idea what is in the background. Depending on the model, a camera can have thousands of photos of scenes, and the ideal shutter speed and aperture for each of these scenes, in whose memory and try to fit the scene with his memory so that it can then impose optimal speed of speed and aperture value. This approach "memory" can never match what is known about the scene. So if you, if you decidethe background, how you communicate to your camera?
You can control the amount of background in focus with the opening of his camera. The larger the aperture (eg f5.6 instead of F11), is more blurred background. in the two above photos, photos of your child has an aperture of F16 during the photo of your daughter has an aperture of F4.
Because the camera is so many openings, if only F4 and F16? The answer is complex -Opening substantially affects the focal plane or at a fire in front of and behind the subject and of various lengths and the lens away from the subject will affect the focal plane. For the purposes of this article, for all that is written to go beyond the P mode, use the largest aperture possible, if he wants to blur the background and use F11 or F116 do if the details to get the background.
But how do you want the panel to yourCamera? The answer is a change in dial your DSLR from a P - A is for Aperture, and once you have done this, simply select the desired aperture and the camera automatically selects the appropriate shutter speed. It seems so easy, and it would be if we do not worry about the shutter speed. With a very small opening, only a small amount of light in the path on the camera sensor registers that the shutter is open more as a meansYou would if you had used a very large aperture. In the two photos above thought, the guy is on so that the actual exposure time of 1/180th sec is not a problem, but the girls who dance and I had a shutter speed of 1/180th second, they would merge, actually I have a shutter speed of 1/1500th sec. So, what shutter speeds gives you the best results?
If you are photographing a landscape, if your shutter speed to 1/60th of a second or faster (for example, a 1/250thSecond). If you're photographing a person in a Registry of the landscape, then the shutter speed must be at least 1/180th of a second or faster. During filming, a dancer in a landscape then the shutter speed is 1/500th of a second or faster. If you are into art, when shooting a moving and wants the girls who want to be out of focus, you must make sure that the shutter speed below 1/15th of a second, as the photo below.
Suppose you want to take a picture of your daughter dancein the mountains. In open mode, select a very small opening, say F11, to ensure that the mountains are behind him, not blurred, but the catastrophe to read your camera, the camera has a shutter speed of 1/125th of a second, which is by far chosen not fast enough, since it is 1 / 3 faster than what you need is (1/500th second, twice as fast as 1/250th second, twice as fast as is 1/125th of a second) to do something? You can remember your opening F5.6 increase (from the firstArticle, the F11 can in half the amount of light that works f8, which in turn can be half the amount of light that makes f5.6).
But the mountain would make a F5.6 aperture, so blurred, what to do? Ask your daughter to stop moving and somehow make them dance in Photoshop when you get home? No, you have to do, the camera's sensor is more sensitive to light - if you make three times more sensitive, then f11 the shutter speed is what you want to 1/500th of a second.
Buthow sensitive the camera sensor? In the dark days of the first digital SLR, you'd need a faster camera in the movie. The films were compared for their sensitivity to light at 800 ISO (ISO is also known as ASA) film is twice as sensitive as ISO 400 film to review again more than twice as sensitive as a film of ISO 200 . This meant that a film of ISO 800 is only 1 / 3 of light through a 200 ISO film in the same amount of light required for the film records required.
So whyas is relevant in the digital age? Since you can easily change the sensitivity of your digital SLR sensor average roll 'so to speak. Let's go back to photograph your daughter wants to dance on the hill, where was the camera to ISO 200 when you found the camera selected 1/125th second, f11 if you have selected, all you have to do is to ISO 200 and ISO 800 to increase your daughter is pretty sharp, as the mountains are behind him.
So why not use cameras muchHigh ISO all the time? The faster the camera to ISO, the more "noise" there is - start on site in the darker areas or shadows in the image where there should be no points, and this is not aesthetically desirable. Also, sometimes a combination of slow shutter speed and aperture you want small.
In summary, an ISO date, a large aperture to blur the background and require less light than a small opening, the background details are obtained, but require moreLight. Increasing the ISO will make it sensitive to light your DSLR sensor, which will then open using a shutter speed to a desired.
The next article explains how you focus the camera in P mode, and you need to know your toensure subject in sharp focus.
Using your DSLR camera - How to choose the right aperture, shutter speed and ISOhttp://www.pongsak.cz.cc High Definition Television (HDTV) 711ME
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