All that glitters is not gold

Purchase guide of the digital camera
First, camera specification
1.Picture element. Picture element is the most basic unit of the digital image, each picture element is a snack. The picture is composed of much picture elements, it is expressed with the resolution ratio that different picture element is arranged, the higher the resolution ratio is, the more necessary picture element is. Such as the picture of resolution ratio 640* 480, probably need 310,000 picture element. It is about 4 million that general A4 paper prints picture element bestly, only about enough 2400* 1800. The higher the resolution ratio is, the formation of image is the larger in size, it is the higher to enlarge the proportion. The digital cameras mostly exceed 7 million picture element at present, it has been already enough.
2.Sensitization device. The sensitization device is that the picture forms the system, is a key system of the digital camera. The commonly used sensitization device is CCD, CMOS. The bigger the device size of sensitization is, the stronger the ability of the formation of image is. 1/1.7 of the size is greater than 1/2.5 of the size.
3.Focus. The longer the focus is, the farther the visual distance of the lens is, but the narrower the angles of the range are. The focus enlarges the picture long, is close to the target without losing the result of the picture, just like lens of the telescope. The shorter the focus is, shoot the range and change big, the relative object will be relatively small, suitable for shooting greater scene at short range, that is wide-angle lens which we say often. The optical zoom is a real focus index, and the ability index that the lens can reflect the picture, and it is enlarging to picture that has already caught that the number zooms, will diminish enlarging to the picture to certain extent.
4.Diaphragm. Diaphragm heavy to can adapt to insufficient light, whom unit time enter light large. Size of diaphragm numberize, figure heavy to say diaphragm to be little, light amount entered to that is to say the less.
5.Shutter. The quicker, the apter to catch the high-speed image moved the shutter speed is, it is difficult to cause the image to be fuzzy because of rocking while generally shooting, may result in, enter light quantity to be insufficient while being fast, at a high speed shutter must be used when the light will be stronger usually, or cooperate with the diaphragm to enlarge. And when the light is insufficient, the slow shutter is more suitable, but may need the tripod to assist. It can already accord with the general demand until 1/1500 seconds that the shutter of the digital camera can stand for 2 seconds.
6.Little distance. It is that the theme that will shot furthers, enlarges to shoot the little distance, can shoot very clearly at short range, with the picture that the naked eye can not be read. Some camera even can press close to, come to 0.1 left and right sides close to make. Generally little to can shoot from 1-3 a good one little from the picture.
7.Sensitivity. ISO represents sensitivity in the digital camera, it proves the stronger the sensitization ability of this sensitive material is that ISO number value crosses the higher position, the requirements for exposure little, but the shortcoming is, the higher the sensitivity is, the thicker the particle of the film is, the result after enlarging is relatively bad.
8.The battery of the digital camera and power consumption. Because digital camera has LCD display screens and built-in flashing lamp, so the battery is larger than the traditional camera in consumption. It is cheap to use the price of battery No. 5, so, had better choose to allocate the model that can charge the lithium battery.
9.If other other functions dispel and see red functions such as glistening, white equilibrium, exposing compensating,etc., the general cameras all accord with the daily instructions for use.

Second, preparation step
The first step, buy use and purpose of the camera clearly. Only understand one’s own demand, could choose and buy the machine that oneself really need with a definite target in view. For example some people buy digital camera for go out, travel, some want, shoot little from photo, image photo,etc..
The second step, determine the psychological price.
The third step: Collect the materials through various routes. Introduction or assessing and testing and can let you understand the camera the digital camera to the digital camera, can also download the operation instructions from the camera manufacturer’s homepage to understand in detail.

3, purchase machine, check
1.Try not to pay first, pay after check-offing.
2.See whether to pack very old, the envelope which checks the external packing sticks to. (the following picture, what the Canon camera used is disposable label)

3.Check the telephone of inquiring free of charge on the other gift box. (pursue as above, the anti-counterfeit telephone number of Canon is 8008200020, can only inquire about with the fixed telephone)
4.Open the gift box, check the sequence number. External packing, sequence number which guarantees the card, camera bottom should be identical. (pursue half a part in right and make Fig. as above)

5.Look over the appearance of the machine. See that are there scratch, including the lens, LCD (LCD) on the fuselage , outer cover.
6.Pack into the battery, card, start the machine. The new machine will reveal that set up time. (the following picture)

7.Try to shoot, use and zoom, see whether the distance can be clearly struck. If not familiar with machine bought, can be shot with AUTO geared while trying the machine. In addition flashing lamp have to try.
8.Then have a look at LCD carefully ‘  LCD)  With CCD (sensitization device) A bit worse.
The method is as follows: At one paper that level, try hard, allow light enter scene camera scene gentle button, take a all black photo, observe photos carefully, judge LCD (the LCD) With CCD (sensitization device) A bit worse. If a LCD is a bit out of more order, do not matter if exceed 3, do not influence taking pictures. If CCD (  Sensitization device)  A bit worse, must change. The LCD displays on the screen a bit more out of orderly, and CCD displays on the picture a bit more badly. Can set up various mode test while shooting, need choosing fastest and slowest shutter speed to shoot one respectively.
The second kind is examined with the software. Now most popular bad some tests software is DEADPIXEL.
9.Open after the gift box seeing fittings of box have, use or not obvious trace that disassemble, whether there is scratch in the place that especially should pay attention to the pin of the battery. Check whether the fittings are all here, usually there are lists outside the gift box, have proved how many random fittings there are, we can contrast and check in detail.

10.Should agree to draw a bill before paying the money, buying the digital camera must draw a bill. The camera is apter to go wrong, there are invoices that are guaranteed or recalled.
11.Read the manual carefully after buying back the camera, and go to websites to inquire about the true and false. Straight conduct goods all manuals should be the simplified Chinese characters one. It is the simplified Chinese character one too to operate languages in acquiescence of the camera. The camera will not have fake products, but may reprocess goods, sending back goods, smuggled goods,etc..

Fourth, purchase of fittings
Usually we may need to buy storage card, media reader, battery, charger, camera wrapping up, tripod,etc..
1.Storage card. SD card of general 2G is about 50 yuan, 100-130 yuan for speed SDHC card 6 of 4G. The imitative card is numerous, should pay attention to telling truth from falsehood.
Gold person really nips speed SDHC card 6 of 4G once:

The false card is very cheap, but apt to go wrong, even if the distributor promises to go wrong for you to change, don’t buy either! The general digital card used for products is SDHC card now, it means card of SD high capacity, generally have speed 2, speed 4, speed 6, respectively represent and write into the pace 2M per second, 4M is per second, 6M is per second. Buy after the Carlos writing out the receipt ‘  It is certainly better if can draw a bill)  ,It must be a normal product card to say hello, once inquire that it is a false card to come out, send back goods.
The verification of the flash card can pass the agent and manufacturer two respects inquiry.
The gold person’s agent of fits the rich profit, assists the letter, permanent having a surplus of, standing grain, laser and uniting strongly of fine horse. There should also be manufacturer’s prize of gold person to stick to in the other gift box of the card: It was the old label that made and pursued the left, spending too now. The right is a new label.

The media reader is careless to just buy one. Generally 10-15 yuan. Century fly upward produce “  The magic elf “  The media reader is very good.
2.Battery and charger. DC (digital camera)  Take battery for two, one to can charge lithium battery, one AA (5) Nickel hydrogen battery. Can charge the lithium battery and must be gone to the regular shop to buy, there is fewer probability of the fake products. AA (the 5th) The nickel hydrogen battery is numerous, the ones that tasted winning, the south and inspired confidence in are good, it is a little bigger to try hard to buy the capacity, such as 2300mAh or 2500mAh ‘  A hour)  . Have an optimistic view of charging time of the charger when buy the battery, try hard to buy filling quickly.
Taste, win magnitude fill, charge suit (2300mAhx4 prop up, install) fast The current price on market is 110-140 yuan. No. 2 Branch is put to fill about 70 yuan which is charged the suit quickly.
3.The camera wraps up. Cheap about 10-15 yuan, about 30-50 yuan better.
4.Tripod. The cheapest ones are generally 1.3 meters, about 30 yuan.
5.Other if liquid crystal reject, stick to 5-10 of membrane, UV mirror and switching ring (protect that scene spend) 20 yuan.

Fifth, other explanation
If there is certain experience, don’t go to the brand monopolized shop such as Canon’s sale monopoly, because the machine of the monopolized shop is very expensive! They all kill the pig!
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