How to choose home digital camera turn (1)
How to choose home digital camera turn (1)
After several years of experience and the rapid development of the ups and downs , how we should look at home with DC functions? What can be more useful for us , which seems sad to it as tasteless ? If you have a digital camera should have quality and ability to scanty or very concerned about the home camera differences in performance on the advantages and disadvantages ,Apple Laptop Battery that you please follow me into the digital camera 's internal world!
Derived from the principle to the application :
To understand the digital camera application layer , the first should be the principle and its imaging principle understand .Apple PowerBook G3 Battery, Apple PowerBook G4 Battery, Apple PowerBook G4 15inch Battery, Grade from the imaging device , the strength of manual control functions , whether in terms of replacement lenses , digital cameras can be divided into home -based , quasi- professional and professional -type and other types of model , but no matter what type of product and its basic working principle of no Different . Digital cameras and traditional cameras, the mechanical structure in the optical , electronic exposure control and so on are very similar , differences in the two largest imaging media and imaging principle is different from the traditional silver -based cameras to the chemical sensitive film to record images, and Digital cameras use a special fiber media converter parts : CCD ( charge-coupled device ) to record video, and film in different , CCD and other components necessary to truly complete with digital photos of records , so the imaging camera and the camera works better than traditional Much more complex. Digital camera basic structure and working principle is as follows:
Schematic illustration of
Digital camera by the lens , CCD, A / D ( analog / digital converter ), MPU ( microprocessor ), built-in memory , LCD display , memory media and computer interfaces, components, digital cameras and traditional role of the lens The camera is the same, it brings together images taken on CCD photosensitive device , Apple PowerBook G3 Battery, CCD is a special role with the photoelectric conversion semiconductor devices , which replace the ordinary position the camera in the film , its function is to light signals into Electrical signal .
CCD sensor to capture an electronic image after the scene , could not immediately be sent to computer processing , but also in accordance with the requirements of the computer from the analog signal to digital signal conversion , ADC ( ADC ) devices used to perform the work. Next, MPU ( microprocessor ) and compression of digital signals into a specific image format , such as JPEG format . Finally, the image files are stored in camera built-in memory. After this series of complex process , a digital photo shoot be considered finished .
In fact, both the traditional cameras or digital cameras, photography enthusiasts, for controlling light and shadow is a process and experience , more people like to call it art . But you have to really want to hold hands to complete a home digital camera " work of art " , Apple PowerBook G3 Battery, Apple PowerBook G4 Battery, Apple PowerBook G4 15inch Battery,it is not every camera can be as much , in fact, the same imaging principle , in the end , what factors do about our art cells ?
First, the lens
Lens is the camera imaging system, the most critical link , it will directly affect the quality of the final pictures. We usually know the professional optical equipment manufacturer Schneider , Carl Zeiss , Leica , and camera manufacturer Canon (canon nb-2lh charger) , Fuji , Ricoh , are experts in the lens industry , their products high reputation , excellent capacity and technical content of security, use of these products, Apple PowerBook G4 Battery, DC general won the trust of consumers .
Lenses that are involved in relatively wide range , in the home digital camera , we often encounter on the telephoto , wide angle , macro and other concepts , which are covered by part of the lens . Current mainstream consumer digital camera with 3x optical zoom basically 5-10cm and macro function , and as the popularity of DC and parts of household production costs brought down , we have more excellent performance should choose Products . For example, Ricoh 's R series, with 4.8 optical zoom lens , 28mm wide-angle capability and 1cm Super Macro The machine was equipped with only a quasi- professional quality . Wide-angle lens production costs generally better than normal 35mm or 38mm higher , but this is value for money , because the 28mm wide-angle visual angle of 76 degrees , while the 35mm viewing angle is only 62 degrees . Use of such products , will allow us to demand in different settings and more calm before the change .
2CCD
Digital imaging technology electronic components recorded by CCD optical signal , and digital form through the binary image . Image quality of its presentation of indicators on the number from line into pixels and color depth . The number of pixels CCD image quality has become an important factor in the decision , the current mainstream consumer digital cameras, the number of pixels generally achieve more than four million , can easily cope with more than 6 -inch photo format the fine print
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