Digital camera autofocus photography skills

Af technology is computer vision and all kinds of canon nb-2l battery imaging system key technical one. Digital camera af camera with the traditional the automatic focus is not the same, the traditional camera af is a form of the realization of the range, and a digital camera is taken the automatic focus of digital information processing is technology, through to the information collected calculation code, and the output control information, drive focus motor focusing accurately realize.

A typical autofocus system should have the following several units: imaging optical lens group, imaging devices, af unit, the lens drive unit. Imaging optical lens group including optical zoom lens filter, group Canon EOS 1100D Battery and focus lens groups: imaging device is digital image sensor CCD, output image information the digital quantity; Automatic focus by DSP chip unit as the key devices, image information collection, calculation, the control strategy of the choice and control signal is produced in this unit; End drive units including stepping motor and power circuit, this unit accept af unit control, drive imaging optical lens group of the zoom lens group and focus lens position control group, and finally make the image sensor output accurate focus image. Af system composed of block diagram.

Any a camera, no matter how much volume, function more complex, can take it as a piece of a burning. In the basic principle of the optical, from a different direction into the space of light, and in through after a burning, will be a little refraction and cities in, usually called the intersection point. To clear all the points on imaging position of plane, called focal plane. The location of the focal plane is usually the film or the position of the photographic Canon EOS Kiss X50 Battery device. If the camera is able to clearly ceaselessly projected onto the plane, this is the zoom, and to take off the focus (scattered coke) means like no converge at the focal plane, like the focal plane from far, shooting out of the image is fuzzy.