Wednesday, April 20, 2011

Viewfinder

The digital camera viewfinder to monitor the image through the eyepiece part, and now the digital camera viewfinder eyepiece viewfinder only black and white and color viewfinder. But for professional-grade digital camera viewfinder for both black and white, black and white viewfinder for the photographer to correct more beneficial composition. Digital camera viewfinder, like the structure and its LCD screen, both with TFT LCD, while the difference is between the size and power consumption. Introduction Viewfinder, the digital camera to monitor the image through the eyepiece part, and now the digital camera viewfinder eyepiece viewfinder only black and white and color viewfinder. But for professional-grade digital camera viewfinder for both black and white, black and white viewfinder for the photographer to correct more beneficial composition. Digital camera viewfinder, like the structure and its LCD screen, both with TFT LCD, while the difference is between the size and power consumption. General digital camera viewfinder is relatively small, only enough to observe the user to close one eye; for some professional models, or some shoulder-DV, it's even more than the LCD viewfinder screen pixel bigger, this convenient photography Teachers see the shots. Compared to the LCD screen, the viewfinder there is another advantage in that power, in general, in the case of the LCD screen closed, only the viewfinder, at least a quarter of the time can save power.
 
Digital camera viewfinder is generally in the vertical direction of rotation, there are worse rotation up to 90 degrees, more convenient when the photographer shot in the standing position. Moreover, most of the eyepiece viewfinder can change the distance, to facilitate those myopic glasses photographer. In general, for professional photography, the viewfinder is a very important part, so we look at those professional DV, in the viewfinder on the workmanship is very good, this is for the convenience of professional photography and design. Optical viewfinder and electronic viewfinder What is the difference? Which is better? Fortunately, where? Categories Optical viewfinder and the lens is divided into two separate one is commonly known as optical viewfinder (previously used to fool the camera), then one is commonly referred to as TTL through the lens viewfinder (mostly for SLR cameras).
 
Compared with the LCD viewfinder, the first two viewfinder has many advantages. First, open the LCD to avoid excessive depletion due to electricity, which can increase recording time and battery life. Second, when shooting outdoors, it can avoid the reflective LCD display viewfinder due to the error. Detailed comparison of these three differences between the viewfinder: 1, optical viewfinder Regardless of the camera lens is fixed focus or zoom, optical viewfinder viewfinder are the same, it works has nothing to do with the lens, it's just imitate the lens of perspective and focus. Are household fool cameras (including consumer-grade digital cameras), mostly using this framing.
 
Optical viewfinder into the hole determines the size of the clarity of the image, for users with glasses, a relatively large number of light holes becomes more important, because the eye glasses will make them far away from the viewfinder, This can not accurately framing. Now some of the viewfinder with a diopter adjustment function can be, so shooting in the camera can not wear glasses when you can conduct a more accurate framing. However, only the past, hyperopic refraction can be adjusted only by those who, for the photographer with normal vision, the diopter adjustment meaningless. Optical viewfinder should be close to the center of the lens optical axis to reduce the viewfinder parallax. The reason why there will be disparity, because the camera lens and the viewfinder are viewing the subject from different locations, and thus also their respective scenes to see there are some differences. In general, the optical viewfinder does not show 100% of the lens capture an image, only about 85% of the actual frame or less. This is the reason for the development TTL viewfinder. 2, TTL optical viewfinder The viewfinder is usually equipped with the more expensive digital cameras, it can display the images captured by the lens. In traditional film cameras, most have used this framing. TTL viewfinder system works in different ways is different, the specific use, that can display the details are not the same, but they are all through the lens of the light by reflection or scattering, so as to achieve the purpose of framing. So for the TTL optical viewfinder with a digital camera, the adoption of the LCD screen and viewfinder to see the image is the same. 3, the electronic viewfinder The advantages of the viewfinder TTL viewfinder with the same: the picture shows the scene to be shot, you can see in daylight, and can display aperture, shutter speed shooting information, but otherwise, you can display the camera menu, which The viewfinder is the other can not be done. Electronic viewfinder shortcomings can be summarized as three: the optical viewfinder, TTL viewfinder different, it requires a lot of power; like LCD display, easy to reflective, thus affecting the accuracy of shooting; compared with the optical system seemed more rough. This last one will become very important, because such a system can not display frames taken in the smallest details, such as the human eye is not open and so on. What digital camera sensor requirements and the difference? Non-professional digital camera body using one of the lenses, lens shutter, the shutter before the exposure to the formal normally open, closed again before the formal exposure, usually light to direct light-sensitive device, so the LCD viewfinder can be easily achieved. Professional digital cameras are mostly based on traditional camera body design. With focal plane shutter curtain, there are mirrors, the light can not be reached before the actual filming sensitive device, so the LCD viewfinder is not easy to achieve. And, for the true SLR models LCD viewfinder is not much need. In addition, the professional interchangeable lenses for digital cameras, how to keep clean photosensitive device is a difficult problem, and if so the shutter normally open, this problem would be more serious. The digital camera viewfinder to monitor the image through the eyepiece part, and now the digital camera viewfinder eyepiece viewfinder only black and white and color viewfinder. But for professional-grade digital camera viewfinder for both black and white, black and white viewfinder for the photographer to correct more beneficial composition. Digital camera viewfinder, like the structure and its LCD screen, both with TFT LCD, while the difference is between the size and power consumption.

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