Parameters when asking for help to buy a camera

1, pixel. The higher one is better, now100000, 1200 or140000. Professional ones will be higher (for example, Canon EOS 1Ds markIII can reach 2/Kloc-0.0 million pixels).

2.CCD size. This matter is very important for SLR. The bigger one is better, and the image is clear. At the same time, it will have a higher signal-to-noise ratio. 100000 is about 24mmx 16mm.

3. focal length. The bigger the zoom, the better. The smaller the minimum focal length, the larger the field of view. It is a wide-angle lens, including 18, 17, 12 mm, etc. , mostly used for landscape photography. The larger the maximum, the farther you can see is the telephoto lens, which now includes lenses of 300, 400, 600 or even 800 mm, and is mostly used for wildlife photography and sports photography.

4, continuous shooting speed, the sooner the better, fool machine is generally around 1~2 per second, SLR can reach 3-4 per second. Professional will be faster (Nikon D3 can reach 1 1 sheet per second).

5. The larger the 5.ISO value range, the better, and the larger the shutter range. The slowest shutter of SLR can reach 30 seconds or even longer, and the fastest shutter can reach 1/4000 or even 1/8000 seconds.

6. More practical are lens group, price, focusing speed, focusing success rate and imaging quality. Accessories Quality and Battery Life (continuous shooting * Zhang)

Handle, workmanship, material.

7. Display pixels. At present, the size of the display screen is generally 2.5 to 3.5 inches. Pixels are generally 230 thousand or 920 thousand. Of course, the bigger the two, the clearer it is, and it is more convenient to view the photos and observe them more carefully. But the problem is that power consumption increases.

8. Focus speed. Shutter delay (generally 80ms-40ms, the sooner the better), the work and size of photosensitive elements, noise reduction with high sensitivity, bilinear processing of Jiao Wai, color reduction, definition at high magnification, dark angle processing, distortion processing, CCD(CMOS) with or without bad points, and can be returned if necessary. Whether it is easy to lose focus, anti-shake, color restoration, starting speed (generally about 0. 1-0.2 seconds), image processor, white balance accuracy and many other indicators.

Personally, I suggest going to the mall instead of online shopping. Not 1200, not easy to change. When you go to the mall, you can ask the sales staff more, have a better understanding of the camera and help you choose it. After-sales service is guaranteed and the risk is small.