CCD certainly not good to see a small selection pixel digital camera.

<P> ● digital camera sensor is the heart of </ P> <P> we all know, digital camera sensor plays the role of the heart, is the essence of digital camera images. .Can be said from film cameras to the evolution of digital cameras, the most essential contents of the film is actually the process of replacing sensor. .When the photographic process into the physical from the chemical reaction on the electronic movement, thus also a lot of convenience was born. .First, the sensitivity no longer determined by the film, but only take pictures of a property is set; another film that is so that photographers can look back at the first picture, you can largely avoid losses. .</ P> <center> </ center> <P align=center> shoot digital camera has brought a lot of convenience to give </ P> <P> consumer digital cameras currently the most commonly used primarily for sensor CCD (charge-coupled .device image sensor) and CMOS (complementary metal oxide semiconductor) two. .Many people know the number of pixels is an important light-sensitive device performance. .Meanwhile, the photosensitive area is also a period of important factors affecting their performance. .Photosensitive device size, CCD / CMOS area is larger, the photon capture the more sensitive the better the performance, the lower signal to noise ratio. .Currently the mainstream consumer digital cameras is the CCD, digital SLR cameras use CMOS sensors have a number of products. .</ P> <P align=center> digital camera sensor is the heart of </ P> <P> traditional camera film size 35mm, 35mm for the diagonal length, 35mm film of the photosensitive area is 36 × 24mm. .The CCD / CMOS production cost, a digital camera sensor generally does not reach the diagonal size of 35mm. .Of course, being a full-format digital SLR cameras such as Canon's EOS-1Ds CMOS models size 36 x 24mm, 35mm reach the area, so from the image quite well. .In addition, there are slightly smaller than the APS format wide-format (25.1 × 16.7mm) and APS-C format (23.7 × 15.6mm), kind of format of the CCD / CMOS is also equipped with most digital SLR cameras in the (Sony R1 .is an exception, as the consumer model, which has an APS-C format of the CCD). .</ P> <P align=center> sensor size ratio of the reference Click to enlarge view </ P> <P>, of course, for the consumer digital cameras, from the cost and size of the design on the fuselage, it is not permissible, .large format sensor. .Present the basic consumer digital cameras use CCD is sensitive material, but mostly 1/1.6 inch size to 1/3.0 inch (diagonal size). .For such a small size of the CCD, the pixels will cause a theoretical increase quality decline. .</ P> <P> CCD area because they can make it through optical quantitative large, sensitive performance enhancement, increased signal to noise ratio, many people intuitively believe that most current models use the 1/2.5 inch CCD output .quality is not ideal. .In fact, the current narrow CCD area improved mainly by improving process technology, which reduces the line on the sensor area, increase the aperture ratio photographic materials to achieve. .More simply, is to narrow ridges between fields, rather than not to reduce the field (light-sensitive open) area. .As for the problem of interference between pixels, but also by enhancing the shielding and other means to control. .It can be said, 1/2.5 inch CCD currently in use does not produce any fundamental negative impact on the quality, let's take a look at </ P> <P>.