Auto and manual focus modes in digital cameras

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One of the most important phases of shooting a good photo is focused on objects in the photos. Photos that look bad out of focus and blurry. Sometimes shoot out items focus is on the end as an artistic effect, but in most cases, a sharp object is the goal photographer.

Most low-end digital pocket cameras do all the focus of the work for you. These are literally "point and shoot" cameras. Moreover, even if you wanted to manually focus with cameras like that wouldhave been virtually impossible, because it does not include an optical viewfinder. Using the LCD screen to control focus is useless, since the LCD display is not really enough to let you know when an object is perfectly focused or not.

Digital SLR cameras, on the other hand, have an optical viewfinder, which you can really show the image through the lens of the camera. With digital SLR cameras, you can see how the objects are concentrated in the image and adjust the focus, if necessary.

DigitalCameras support a minimum of three focus modes:

Manual Focus: In this mode, the camera is not automatically focus on objects in the picture. You must manually set the focus as desired. This is done or by pressing a few buttons to activate the focus, or more often carried out by rotating the ring on the lens or counterclockwise as needed. You can use the results of the change in focus when looking through the viewfinder. If you are satisfied with the focus canpress the shutter button to take the autofocus photo.Single: In this mode, the camera automatically focus on objects in the picture. The camera focuses automatically when you press the shutter button or all the way to a photo or a half way down sharply around the theme of fire. In this way, the automatic focus process is performed only once when the shutter button is pressed. Once achieved, the focus is locked and has not changed until the next time the shutter ispressed. If you move and hold the shutter button halfway and then the camera or the object moves the focus may be lost. This mode is useful when recording static objects. In most cases you press the shutter button depressed halfway. The camera is running, the process of auto focus. It tells you when the focus when viewing a picture and a short green auto focus is beep.Continuous: In this mode, the camera focuses continuously on the objects in the picture.As soon as the shutter button is pressed and held until halfway, the camera always focuses on the objects in the picture. In this mode, the camera continually adjusts focus as the distance of objects by the modification of the camera. This mode is useful when shooting photos of moving subjects like a race car during a race or airplanes during an air show. You can hold down the shutter button pressed halfway and move continuously to follow the camera to the object. The camera is in continuouskeep the object in the foreground. If you are ready to take the picture just press the shutter button to activate the bottom. A disadvantage of this approach is energy intensive, as the camera is constantly revised to keep one's eyes to use the power hungry motors move the target for the optical components.

Like any other feature automatic and manual focus modes have their advantages and disadvantages. The first step to be with them to their advantage to understand how they work and what they were designed. Thenext step is to experiment shoot photos using different focus modes and different types of objects and see how it behaves the camera. Once this is done, it is ready to instinctively use the best mode reference point for every situation of photos.

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