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How to choose a SLR camera

2018-01-09 22:24:00

SLR cameras are generally divided into three grades, professional machine, mid-range machine, entry-level machine. The professional machine is characterized by reliable quality, excellent performance and high price. Full-frame cameras are basically professional machines, such as Canon's 1 series 5 series. Professional machine is metal, professional machine tens of degrees below zero can also be used normally, speed can be up to 1/8000 second high-grade machine quality is not as good as professional machine, refers to the fuselage, mid-range machine part is plastic, performance is also shrunk, shutter speed, aperture range is relatively wide, non-professional machine speed may be 1/4000. Medium and high-end cameras are mainly designed for family users' purchasing power. Medium and high-end machines are generally APS format. Such as Canon 7 series and 2-digit 50, 60 series. The entry-level machine mainly meets the needs of people who like SLRS, but are seriously underfunded, and the entry-level fuselage + head is generally 4,000 yuan - 6,000 yuan. It's also APS. Three-digit 550D, 600D, etc. Before buying a camera must look at the specifications, just like buying clothes must know their height, we do not need to spend too much money to buy a camera that they do not need, there is no need to save money to buy a SLR that they are not enough. 1. Shutter speed. For digital SLR cameras, the aperture size is determined by the lens, and the shutter speed becomes the most important exposure parameter of the body. 2. Speed. In the film era, the speed of a roll of film was fixed, and digital cameras had the advantage of adjusting the ISO speed through the body. 3. Focus automatically. In addition to the more points the better, the type of focus is also very important, cruciform, or even double cruciform focus of the focus of the focus sensitivity is much better than the ordinary one-way induction of automatic focus. 4. Snap speed. The speed of continuous shooting was once the most acute problem in the competition between Canon and Nikon on professional models. 5. Metering method. Metering methods are mainly divided into point metering, central focus metering, different models may have different titles, "division metering", "evaluation metering" and "matrix metering" and so on. The current mainstream digital camera brands are actually not many, according to the alphabet sorted roughly as follows :1. CANON. The Canon camera is estimated to be very familiar to everyone, and most of the white "big cannon" commonly used by sports reporters on the field are Canon, because Canon has produced a DSLR camera with a very amazing response speed for a period of time. For the first time to buy a DSLR friend, we do not recommend buying those "big gun",EOS 40D and EOS 450D are Canon's latest medium and low-end digital SLR, for the first time purchase may be a good choice. Canon SLR available lens is very rich, there is no body anti-shake function, if necessary, you can consider a special anti-shake lens, of course, will be more expensive than the ordinary lens. 2. NIKON (NIKON) In fact, Nikon's history is longer than Canon, and it seems that the Japanese SLR camera seen most in the United States is Nikon. We need not say much about Nikon's position in the overall development of digital SLR cameras, history speaks for itself. In addition to the D3, which is now living very bright, we can pay attention to Nikon's latest low-end product D60, but it should be noted that this product and Nikon's previous two low-end products D40 and D40X do not have a body focusing motor, so you must buy AF-S lens to achieve automatic focus on the D60 body, of course,AF-S lens group It's pretty big, too. 3. OLYMPUS Olympus led the APS system different from other brands of 4/3 system, is a "designed for digital" SLR camera system, unlike other APS systems are based on the original film camera. The biggest feature of the camera of the 4/3 system is that the image sensor area is smaller, and the image quality is more limited than the APS system, but there are many advantages, the 4/3 system is an open system, the versatility of accessories is very good, Panasonic, Leica are currently supporting the 4/3 system; Some Olympus models have excellent anti-shake performance; In addition, the Olympus DSLR is particularly portable, and the latest entry-level product, the E-420, is quite lightweight. 4. PANASONIC (PANASONIC) and LEICA (LEICA) are two brands that have a relatively short history in the DSLR field, so there are few models to choose from, and they work very closely together, with almost identical models. Because their lenses use Leica technology, they are naturally expensive, and even the fuselage of Panasonic has also taken up the "noble" route, quite a "one person flying, fairy and chicken dog" attitude. Of course, if you choose a Panasonic or Leica body, a number of Olympus digital lenses can also be used. 5. PENTAX and SAMSUNG have much the same relationship, except Pentax has been in the DSLR business longer and has a wider selection of models. And the recent cooperation between Samsung and Pentax has been more than just a copy of the finished product, and the new sensors developed by the cooperation have brought us surprises. Pentax's digital SLR camera has more characteristics in terms of control and is more mature, and the finer imaging brought by 14-bit analog-to-digital conversion is still Pentax's more noteworthy capital. 6 SIGMA (SIGMA) and TAMRON (TAMRON), Tuli (TOKINA) known as the "three big lens" business, Sigma in recent years has finally put the unique X3 sensor on the historical stage, the latest SD14 is the use of this sensor model. Compared with conventional sensors, the imaging color of Sigma's X3 model is also different, but it may take longer to mature. 7. SONY (SNE) The SONY DSLR's lineage comes from Comer, which is the product of a collaboration between KONICA and MINOLTA, which sounds a bit tortuous. But don't forget that Minolta was one of the "Big three" SLRS of the year, the same Minolta that invented the all-in-one autofocus camera. As far as the current SONY digital SLR has not so much the shadow of Minolta models, but from SONY's current highest-end model α700, it still shows some advantages in terms of autofocus. The Alpha 200, Alpha 300, and Alpha 350 are three of SONY's current models, with the latter two offering live view, while the Alpha 350 also has 14 million active pixels.

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