Digital SLR camera in recent
years in constant prices decline, with the D40, Canon, nikon 500 d waiting for
a large number of low-cost entry type appearance, make SLR machine rapidly into
the average consumer life. But for a non-professional home users, high-end of
the console and SLRS really that good? Which is more suitable for your needs?
The first to be really understand related data and performance, can choose and
buy out of a digital camera's error.Effective pixel is a digital camera to
measure the performance of one of the important index, the majority of
consumers in the choose and buy when the camera will also pixels as the
important standard when the choose and buy. Digital camera pixels is higher,
the photos taken resolution also is higher, the picture administrative levels
feeling and exquisite resolution also has the corresponding improvement. So
most consumers are believe, digital camera pixels, the higher the imaging
quality is higher. But the fact is not the case, reason need from digital
camera imaging principle about
Others
.
At present on market of digital camera products are used CCD or CMOS photoreceptor as the sensitive element, a digital camera through the use of photoreceptor, will light into electronic signals, the image processing engine and the relevant circuit processing, can generate high quality digital image. Photoreceptor internal integration of photosensitive unit quantity determines the digital camera pixel. From the imaging principle of speaking, photoreceptor integrated photosensitive unit, the more the images the picture is clear. But pixel is not only decided to imaging quality of the only factors, the size of the photoreceptor and camera imaging quality is closely linked.Household digital camera products in after years of development, mainstream pixels already from two or three years ago 400 to 6 million increased to 800 to 10 million, but due to the fuselage volume and production cost restriction, digital camera photoreceptor size still maintain in 1/1.8 and 3/4 inch, and introduction to use more SLR also 4/3 inches and APS - C size photoreceptor.
Without raising the photoreceptor size under the condition of increasing the number of blindly light-sensing cells, that will bring the signal signal-to-noise ratio is reduced, and the sensitive poor performance and so on, and at the same time the user exception purple edge and calorific value problems with size than low pixel photosensor is more apparent, even years ago listed 4 million pixels of all SLR, its imaging quality is far more than the nominal 10 million pixels card machine products. In addition to photoreceptor factors outside, image processor performance and lens quality also to image quality plays an important role. Therefore, pixel is not the sole criterion for judging the camera performance.Photography players will lens as the camera's soul, for the console speaking, lens is also a very important link. Including SONY, panasonic, etc, kodak digital camera manufacturers to improve their product performance, for its products are equipped with Carl CaiSi, schneider, lycra etc DE system brand of lens. Compared with some digital camera manufacturers to develop lens, DE system lens in analytic ability did even better.
Digital camera zoom ratio is also concern when consumer choose and buy a big parameters, large zoom multiple digital camera can more easily shoot the distant figures, to a great extent, improve the flexibility of filming. But there may be consumers are not clear digital camera nominal zoom multiple include digital zoom and optical zoom. Optical zoom principle is by moving lens to change in the position of the camera focus, make into the lens light change, make onto the photoreceptor of photography as with lens displacement bigger or smaller, so as to achieve the purpose of the zoom.
Digital zoom function is not traditional film machine, the working principle and optical zoom completely different, digital zoom through the camera internal image processing software, will obtain the digital image size amplifier, and the images of opening the pixel interpolation filling processing. Because digital zoom only on photoreceptor central pixel interception, with amplification digital zoom ratio, the lost of image details, the more information definition also decreases, at higher multiples more will make image quality become too horrible to look at. So in daily use, digital zoom and not too big practical value, the author suggested as far as possible when users in the use of closed digital zoom function, if there is demand can through the PHOTOSHOP etc image editing software manipulating pictures to also can achieve the purpose of blowup.
Consumption level the console usually volume is small and exquisite, and general most users in when we travel will not carry tripod, in hand filming will inevitably have small wobble, illumination conditions in poor especially telephoto end shooting, picture, which are fuzzy. Therefore FangDou function gradually become household digital camera with standard. "Not FangDou don't buy" also became a lot of consumer purchase slogan, so, in the purchase is much about optical FangDou and electronic FangDou difference place?Optical FangDou is a kind of image stabilization technology, pick up the technology of digital cameras can maximize reduce jitter caused by image fuzzy problem. The optical FangDou technology also contains lens FangDou and sensitive device (CCD) FangDou. The lens of the FangDou on behalf of the manufacturer to nikon (VR), Canon (IS) and panasonic (O.I.S) IS given priority to, and CCD FangDou technology IS mainly SONY, ricoh and samsung manufacturers master. Two technologies, compared to lens FangDou type to lens design production requirements more stringent, and CCD FangDou technology manufacturing costs are relatively cheap.Lens FangDou is through the lens component displacement to offset wobble adverse effects. Using the technology of lens internal lens depend on magnetic suspension, when the camera internal gyroscope detect tiny sloshing, immediately will signal transmission to a microprocessor, the calculated displacement, through the electromagnetic induction principle of lens groups according to the jitter opposite direction move, so as to avoid the dithering images caused by fuzzy problem. Lens FangDou in telephoto end filming effect is quite significant, in addition users in the filming process can keep image clear circumstances, improve 2 to 3 file shutter speed.
CCD FangDou is another kind of optical FangDou technology, using the
technology of digital camera photosensor was fixed in a mobile support, when
acceleration sensor to detect the camera dithering, will jitter speed and
displacement