Several attributes of judging camera quality

Analysis:

First, the main performance indicators:

1. pixels

In the process of shooting with a digital camera, because the photosensitive element that receives signals is CCD, manufacturers often use CCD pixels as the specifications of digital cameras.

A digital camera that only judges how many pixels it needs can be judged according to the formula, which is: image quality, image size × the square of resolution. ——

If it is generally only used for daily photography, that is, the output of 6-inch photos in the development library (generally 150DPI), 6x5x150x150 = 700,000, then 800,000 pixels should be enough; If it is used to print 12 inch photos (the area is four times larger), then it is12x10x150x150 = 2.7 million pixels. Our general A4 paper is 1 1 inch, so if it is used to print A4 paper, the camera is usually 3 million pixels. It's just that many nominal pixels are "interpolated" pixels processed by software, not their own optical pixels. Pay attention to discrimination when buying. Generally speaking, it should be mainly optical pixels.

2. lens

The zoom multiple of the lens is directly related to the grasping level of the original object by the digital camera. The larger the zoom, the clearer the distant objects are photographed, and vice versa. Therefore, choosing a digital camera with large zoom can also effectively shoot distant scenery when you are away from home.

Zoom is divided into optical zoom (physical zoom) and digital zoom. What really works is optical zoom, and digital zoom only makes the object display bigger in the viewfinder, which has no effect on the clarity of the object. Pay attention to the difference.

The lens caliber also needs attention. If the aperture is small, you can't shoot well in the dark even if the pixels are large.

3. LCD viewfinder

There is nothing profound about the LCD viewfinder, mainly that the brightness should be high enough, the pixels should be large enough, and the larger the area, the better. At present, 1.5 inch to 1.8 inch are popular, as long as you pay a little attention when purchasing.

Second, other performance indicators:

The performance selection mentioned above should be enough for our general choice. But if you care about details, you should also look at the following aspects:

1. Control mode of the flash.

Because most indoor photography needs to use flash, most digital cameras can't connect flash, so the control method of flash is very important. Digital cameras with good functions can support various lighting control modes. If you often take pictures of people, you should choose a digital camera with the function of eliminating red eyes.

2. Aperture and shutter

Aperture and shutter are very important indicators when purchasing digital cameras. A good digital camera can take clear and beautiful photos at hand, but some digital cameras need to use a tripod, otherwise the image will be blurred or weak and cannot be used.

3. Additional software

Because individual users buy digital cameras either to make web pages or to make family photos, videos and photos, they need to cut and modify files. If you can get practical image processing software when you buy it, it is not only very affordable, but also very convenient for future work and use.

Third, volume and shape.

In people's minds, the smaller the digital camera, the better. In fact, the small size of digital camera often means that the lens size is reduced, which means that it does not have the function of optical zoom, and the corresponding shooting and imaging quality will also be attenuated to a certain extent. This is where the digital camera is not satisfactory.

However, DC is always a consumer electronic product, and it is not necessary for people to blindly pursue the perfection of its functions. Enough to keep this moment wonderful. Therefore, for home users, small size, light weight, comfortable feel and convenient carrying are still important indicators for choosing digital cameras.

Of course, there are also some products that are relatively small and have good performance, which can satisfy our confusion in this respect. However, the price of such products will be very expensive.

Fourth, compatibility.

The compatibility of a digital camera depends on its battery and memory card.

At present, various brands of DC on the market use different forms of batteries and memory cards, which are full of personality and compatibility has become a big problem. The mainstream models are mainly SD and MMC cards, such as BenQ's 24 10. In addition to Sony's special memory stick, a few cameras still use CF cards, which are often too big for home use.

Digital cameras in Japan have always been stingy, and many 5-megapixel products are only equipped with 32M memory cards. So it's best to buy a large-capacity matching memory card. Of course, if you have the strength, you can choose the popular digital camera companion. At present, 20G and 15G products sell well.

In terms of batteries, lithium batteries are the mainstream of digital cameras, but some brands of cameras use their own special batteries, which are incompatible and expensive.

When traveling, you must consider the problem of battery life, otherwise the battery will run out, and you will not remember the splendid scenery, which is a pity. So, if you have enough money, you can buy large-capacity batteries or super-large battery packs from third-party manufacturers.

Of course, there are also many digital cameras that use the No.5 Ni-MH rechargeable battery with very good compatibility, and generally there will be no battery failure. For example, Samsung V3, V4 and other digital cameras are compatible with 6 or 7 kinds of batteries, which is very convenient for consumers.

In addition, it is worth mentioning that domestic digital cameras.

There is no doubt that price is usually the main consideration for all of us. The price difference has a lot to do with the brand. Well-known foreign brands are mainly Japanese manufacturers, and we are familiar with Fuji, Sony, Canon and Olympus. Samsung in South Korea and Kodak in the United States are also major market forces that cannot be ignored. The price of mainstream models of these brands of ordinary consumer-grade automatic cameras is generally between 1000 ~ 3000 yuan.

Domestic brands of cameras are mainly domestic IT manufacturers, such as Lenovo, Ziguang, BenQ and Wenquxing. At present, the price of mainstream household DC of the same grade is between 500- 1500 yuan, which is far lower than that of digital cameras of foreign brands below the same grade. The price advantage of domestic digital cameras is exciting.

There are many bright spots in performance: for example, one machine can be both a digital camera and a camera; If the pixel is high; Another example is exquisite volume and so on.

Of course, the zoom lens of domestic digital cameras also has great shortcomings. Most of them have no optical zoom, only digital zoom. Therefore, if you need to take long-distance shots frequently, you can ignore domestic digital cameras; But if you just shoot people around you, it is a very practical choice to use a domestic camera.