Today we will talk about how to choose the consumer-level cameras and not SLR cameras. Although consumer-level digital SLR camera is not professional, but its performance can not be ignored, in order to take full advantage of its strengths, it also requires an understanding of the key performance parameters, such as at the time of purchase are not used by unscrupulous sales you can not read a lot of parameters to fool the camera.
Great friends now go into a misunderstanding, in the purchase of a digital camera, the most concerned about is how many pixels the camera. Indeed, both the consumer digital camera or SLR, camera pixel is a measure of image quality standards, it is easy for consumers to buy digital camera, the focus of consideration. In fact, with digital camera technology, the importance of pixels has slowly subsided with Lenovo ThinkPad T61p battery computer.
Let us first say that it is the imaging principle. Traditional CANON NB-7L battery camera imaging principle is to use film to record images on the photosensitive coating, and digital camera imaging principle is dependent on the photosensitive element CCD camera or CMOS, so that optical signals into electrical signals, and then recorded to the camera’s flash. Number of recorded pixels depends on the camera CCD or CMOS chip number of photosensitive elements, in theory, the more light-sensitive cells, captured images will be clearer. However, due to size limitations of digital cameras, so the relative size of the CCD or CMOS is fixed, so in a limited area on the chip to increase the light-sensitive cells will be too many problems, such as image noise ratio, sensitivity decreased. Therefore, excessive increase in photosensitive element even have the opposite effect.
So when we buy a digital camera, in the end the number of CANON PowerShot-G12 battery pixels in order to achieve our daily shooting requirements? In fact, the size can be judged from the photographs. Here we first explain the next pixel resolution, the image size between the three.
Canon G12 is such a camera, it’s only 10 million pixels, not high the small card, but no one doubts it’s performance, coupled with 5x optical zoom 28mm wide-angle Image Stabilizer lens and a flip LCD display, G12 adequate professional instead.
This refers not display resolution, but the print resolution (dpi), pixels per inch. Generally speaking, digital cameras, taken out of the picture displayed on the computer is 72dpi, although such a resolution on the computer watch is very clear, but if we print it out, they would feel very rough picture. And CCD’s the same principle, when a fixed number of pixels in the higher dimensions, the picture is more clear, so the resolution of photos when printing requirement is 300dpi, which is the human eye can feel the highest resolution, which is that even if the resolution of up to 600dpi, we will not find photos of the fine.
G12 is also equipped with an electronic turntable to achieve SLR camera close to the high maneuverability, and integrated into the electronic level, to confirm the horizontal position when shooting. Canon G12 is not only carrying about 10 million effective pixels for high sensitivity CCD image sensor and DIGIC 4 image processor, noise reduction technology has improved the algorithm so that the image resolution under high-sensitivity shooting further.
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