How to choose the right digital camera?

Personally, I think we must choose a digital camera with 3 times variable light CCD lens, and it is best to have the function of MPEG4 640*480 30FPS camera, and the appearance is as fashionable as possible. You can choose a machine with a 2.0 or 2.5 inch viewfinder screen!

The above is the most important choice, and there are various explanations behind it. You can have a look at it when you have time!

Be sure to look at digital websites:

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Model recommendation example:

A 500W pixel digital camera must be equipped with a 5 12M card, and it is better to have an extra battery. If you only spend 2000 yuan on DC, you can recommend too much. If you want to include all the accessories, you can only recommend the products of V530 or Samsung:

Personally, I think U-CA5 is cost-effective! ! ! ! ! ! ! ! !

Don't forget to buy a digital camera with card. After adding card1g (about 450), the price of Samsung U-CA5 is close to two thousand!

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With a little more money, you can buy a Samsung A50.

2.5-inch big screen has face! 5 million pixels

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Both of the above models have camera anti-shake function! But it should be noted that the zoom will be muted when shooting! Be sure to read it on the computer when you buy it, and then buy it when you feel satisfied!

Buy digital cameras and try to buy famous brands! Check the price online in advance! Look at the digital product network:

If we must support domestic products, there are patriots and BenQ to choose from. When choosing, it is best to choose big stores and specialty stores in the factory!

Dealers can look at the Chinese website of Samsung camera:

Generally, digital cameras have USB transmission lines to connect with computers. In WINDOWS XP operation, if the digital camera driver is not installed, after connecting the USB cable, the system will prompt you to find the digital camera immediately and ask if you want to watch photos. At this point, the system can regard the memory card in the digital camera as a USB flash drive. Of course, digital cameras generally have direct processing software that supports operating systems above WIN95. Depending on what brand you are, they generally support the function of creating subdirectories according to the shooting date or download date, which will be more convenient to use. Some cameras also have AV terminals, which can be played directly on TV, but you need HDTV to enjoy better results!

Digital camera selection:

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The factors that determine the performance of digital cameras include the number of pixels of CCD or CMOS, lens, memory card and so on. Of course, we should also pay attention to these main factors when purchasing digital cameras. However, different users have different uses and different selection criteria. Professional photographers, photographers and ordinary users obviously have different needs.

Professional photographers or enthusiasts can be said to be the most critical group. For them, CCD, lens, fuselage and memory card are the best. Of course, good things must have good prices. The price of 10,000 to 20,000 yuan is not affordable for any ordinary family. 5 megapixel CCD and professional lens are essential. You should have at least a 256M memory card or a small hard disk.

Photography enthusiasts and friends have higher requirements, they can choose digital cameras with better performance, they can adjust shooting parameters in large quantities, and the storage equipment has good performance.

For ordinary home users, the most basic principle of buying a digital camera is: easy to use, sufficient and easy to use! ! !

★★★★★★★★★ Pixels and resolution pixels are the most HyPic units of digital images, and each pixel is a dot. When pixels of different colors get together, it becomes a moving photo. Digital cameras often use pixels as the basis for classification, but many people think that the number of pixels is the number of photosensitive points on the CCD photosensitive unit. In fact, this statement is not entirely correct. At present, many manufacturers can produce higher resolution digital images under the CCD photosensitive unit at the same photosensitive point through special technology. What is the relationship between pixels and resolution? How to interpret these two figures when purchasing?

The higher the resolution of the picture, the more pixels are needed. For example, a picture with a resolution of 640×480 needs about 3 10000 pixels, and a picture with a resolution of 2084× 1536 needs at most 3 14000 pixels.

The resolution can have multiple values, and the greater the resolution provided by the camera, the higher the flexibility of shooting and picture.

The resolution of the picture is related to the imaging size and magnification when output. The higher the resolution, the larger the imaging size and the higher the magnification.

Total number of pixels refers to the total number of pixels contained in CCD. However, due to the lack of light at the edge of CCD, some of them do not need to be photographed. Subtracting this part of pixels from the total number of pixels is the effective number of pixels. Therefore, when reading the product manual, remember to pay attention to the effective number of pixels that can be used in actual shooting, not the total number of pixels.

★★★★★★★★ The lens is another extremely important factor. After all, a digital camera is still a camera. No matter how good the CCD is, there will be no good effect without a good lens, just as a low-level camera can't take a good picture with high-level film. Generally speaking, the quality of digital camera lenses produced by traditional professional camera manufacturers is better. But in recent years, Samsung and Kodak have also established cooperative relations with Schneider of Germany, and the quality has been greatly improved!

★★★★★★★★ The English name of Optical Zoom is Optical Zoom, and digital cameras rely on optical lens structure to achieve zoom. The optical zoom mode of a digital camera is similar to that of a traditional 35mm camera, that is, the scene to be shot is enlarged and reduced by moving the lens. The larger the optical zoom coefficient, the farther the scene is photographed.

In some digital cameras, the longer the lens, the larger the moving space of the internal lens and the photoreceptor, so the larger the zoom factor! For example, some digital cameras have reached 15 times!

Digital Zoom, also known as digital zoom, is called digital zoom in English. Digital zoom is to enlarge the area of each pixel in the picture through the processor in the digital camera, so as to achieve the purpose of enlargement. This technology is like enlarging the area of a picture with image processing software, but the program is executed in a digital camera. Some pixels on the original CCD image sensor are enlarged by interpolation, and the pixels on the CCD image sensor are enlarged to the whole picture by interpolation algorithm.

Different from optical zoom, digital zoom is the change of the vertical direction of the photosensitive device, which gives people a zoom effect. The smaller the area on the photosensitive device, the user can only see part of the scene visually. However, because the focal length has not changed, the picture quality is worse than normal.

At present, the optical zoom multiple of digital cameras is mostly between 2 and 5 times, which can zoom objects beyond 10 meter to 5-3 meters; There are also some digital cameras whose optical zoom effect is 10 times. The optical zoom factor of home camcorder is 10 ~22 times, and it can clearly shoot things 70 meters away. Using a magnifying glass can increase the optical zoom factor of the camera. If the optical zoom factor is not enough, we can add a zoom lens in front of the lens. The calculation method is as follows: A 2-fold zoom lens is set on a 4-fold optical zoom digital camera, and then the optical zoom multiple of this digital camera will be changed from the original 1, 2,3,4 times to 2,4,6 times and 8 times, that is, it is obtained by multiplying the zoom lens multiple and the optical zoom multiple.

For most photographers, the magnification effect of 3 times optical zoom range is very good, but the price is not cheap. At present, the main products of major mainstream manufacturers are 3x optical zoom models. Such as C-50Zoom and C-4000Zoom of Olympus, S75 and S85 of Sony, PowerShot G2 of Canon and so on. Among them, Olympus C-50 Zoom is a new product recently launched. Olympus C-50 is an upgraded version of Camedia C-40 digital camera, with the latest11.8 inch 5 megapixel CCD and 3x optical zoom lens. The shell of Olympus Camedia C-50 is brand new. The machine will adopt the most fashionable and compact aluminum alloy shell, and the 3x optical zoom lens will cover 38- 1 14mm, which is equivalent to the focal length of the traditional 35mm camera lens.

If you like shooting distant objects, you need a lens with a wider zoom range. For example, Olympus's C-720 Ultra Zoom is an 8-fold optical zoom lens with a focal length of 6.4-5 1.2 mm, which is equivalent to the 40-320 mm lens of a 35mm camera, leaving great creative freedom for photographers.

★★★★★★★ Aperture range

Another important index of the lens is the aperture value. Its size determines how much light enters the photosensitive unit through the lens, which directly affects the brightness of the image. In this case, taking dynamic photos in an environment with insufficient light (such as indoors) requires a large aperture, let alone shooting at night.

You can choose a camera with a large aperture. For digital cameras, F/4 is good, and F/2.8 is good. Olympus's C-50 zoom, C-4000 zoom, the maximum aperture is F/2.8, and ordinary photographers can use it with confidence. The lens aperture of Canon G2 camera is F2.0-F2.5, which is adopted by many cameras.

Users who often need to use the camera's high-speed shutter capture link or continuous shooting function, the camera with large aperture lens is twice the result with half the effort.

★★★★★★ storage medium

At present, there are many technical specifications for the storage media of digital cameras in the industry. CF card, SM card and memory stick are the mainstream in the current market, and memory stick is Sony's technology, so most Sony digital cameras use this storage medium. SM is a memory card jointly launched by SmartMedia for Olympus and Fuji, so these two digital cameras are using this memory card. With the increasing demand for storage capacity, the invention of new storage technology has been promoted. Olympus and fujifilm jointly launched a removable storage medium this year. This medium is called xD-Picture card, but it is very expensive. The advanced features of new media include volume reduction and very fast data transmission speed. Sony's unique storage technology is special and has a special price-Sony's memory stick is about twice as expensive as the usual SD card and CF card. In addition, the storage time of data after shooting is also affected by other factors, such as image size, resolution and the compression degree of photos. Generally, the higher the resolution, the longer the download time.

Generally speaking, for beginners, SD card is better, CF is the cheapest but relatively slow!

The market of memory cards is changeable, and the general trend is to reduce prices. You can look at the latest market:

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The following parameters are not unimportant, just because all models can basically meet the needs of consumers, but because of the different requirements of consumers, they must be analyzed.

Pay attention to the grip of the fuselage, not only the shape design of the fuselage, but also the shooting effect of the fuselage and the stability of the shutter. Some cameras have poor shutter sensitivity. Compared with traditional digital cameras, the operation of digital cameras is slightly different. You need to wait 1 second to 5 seconds to take the second photo, because the camera needs time to store the recorded data in the built-in memory of the fuselage. Therefore, it is difficult to capture dynamic images with digital cameras.

★★★★★★ Shutter The shutter of a digital camera can support 2 ~11000 seconds, which can meet the general requirements. Of course, if there is a wider shutter range, it can better meet all kinds of strict shooting conditions, such as shooting high-speed moving objects or starry nights. The shutter is used to adjust the exposure time of the camera. The unit is seconds, expressed in reciprocal. For example, 30 and 250 represent 1/30 seconds and 1/250 seconds respectively, so the smaller the number, the slower the shutter speed. The faster the shutter speed, the easier it is to capture high-speed moving images. Generally, it is not easy to blur the image due to jitter when shooting, but high speed may lead to insufficient light input. Usually, when the light is strong, you must use a high-speed shutter or increase the aperture. When the light is insufficient, a slow shutter is more suitable, but a tripod may be needed for assistance.

★★★★★★ Macro shooting Macro is to zoom in and out the subject to be shot. The point is to shoot tiny objects to the size you want. In macro mode, all kinds of digital cameras have different abilities, and some can even close to 0. 1 cm for close-up shooting. Periscope lens cameras generally have macro advantages.

★★★★ Other functions, such as red-eye flashing, white balance, exposure compensation, etc. It has greater flexibility for shooting in various environments.

★★★★★ Automatic white balance correction The photosensitive part of a digital camera is equivalent to the negative film of a traditional camera. The photosensitive element of a digital camera is fixed, so it is necessary to use the white balance correction ability to reflect the changes caused by the light source. It is mainly designed for photosensitivity in different environments. Different light sources will produce different degrees of chromatic aberration, which may make the color blue and yellow, and the white balance correction can be corrected.

★★★★ Exposure compensation Because the camera's automatic exposure function is based on the light entering amount of light reflected by medium gray, if there is too much white in the shooting picture (too much reflected light), the light entering amount will be higher than the photometric standard value, thus misleading the camera to think that the light is very strong and narrowing the aperture, resulting in underexposure of the photo and the white part becoming not white enough. Exposure compensation is aimed at this situation. Only when the exposure is increased by 1 or 2 frames can a bright and correct image be obtained. On the other hand, in most cases of black, it is necessary to reduce the exposure of 1 or 2 squares.

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Many consumers, because they don't understand digital cameras, unilaterally think that pixels are high. Not exactly. When choosing a digital camera, we should consider its digital and optical characteristics.

1, digital camera lens. A well-designed high-end camera lens consists of multiple groups of lenses, including aspherical lenses, which can significantly reduce color shift and minimize graphic distortion and distortion. Expensive fluorite or glass is used as a lens. In order to reduce weight and cost, the lenses of household and semi-professional cameras are made of resin.

2. Image value of CCD of digital camera. CCD is the heart of digital camera, and it is also one of the main factors that affect the manufacturing cost of digital camera. Therefore, it has become an important standard for digital camera classification. At present, entry-level products are all 3-5 million pixels, and commercial and semi-professional users prefer products with more than 5-/kloc-0.0 million pixels.

3. Zoom of digital camera. Optical zoom is a real zoom, which will not affect the imaging quality of photos; Digital zoom is electronic zoom, which is a local enlargement at the expense of photo clarity.

4. Battery and power consumption of digital camera. Digital cameras have LCD screens and built-in flashlights, so the battery consumption is higher than that of traditional cameras. It's cheap to use the No.5 battery, and you can buy it anytime and anywhere, but it won't take long for the battery to die. Therefore, it is best to choose the model equipped with rechargeable lithium battery. At present, mainstream digital products have been designed as lithium batteries, and complete charging equipment is provided as accessories.

5. Additional functions. The more functions, the more fun and uses it means to use a digital camera. For example, many digital cameras have video output function, which can be connected to TV to browse photos; Some can set their own startup screen and shutter sound like mobile phones; Some can have short-term digital video recording function. The driver installation of digital camera should be very simple, and it should be able to download pictures quickly and preview them. For example, the software function attached to Canon digital camera is perfect, which can classify and manage pictures, and the settings when printing are more diverse, and pictures can also be simply modified.

Image sensor is the decisive factor of camera performance. Generally speaking, the pixel value of the image sensor should be greater than the maximum pixel value of the real shot image. In order to make up for the pixel shortage of image sensors, some manufacturers use software interpolation to improve the pixel value of images. In fact, this interpolation method can be realized in almost all image processing software, so it is of little practical significance. The purchase must be based on the hardware pixel value of the image sensor, not the maximum pixel value of the output image.

Digital cameras record photo information in a semiconductor element called CCD (Charge Coupled Device), instead of the film of a silver salt camera. The size of CCD, like TV, refers to the diagonal length, expressed in inches, such as "1.27 inch (note)". The larger the CCD, the more pixels and the higher the sensitivity. Therefore, with the same number of pixels, the larger the CCD, the better the image quality. CCD size 1/2.7 inches (4.0mm×5.3mm) 1/2 inches (4.8 mm× 6.4 mm)1/0.8 inches (5.19 mm× 6.9/.

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About the budget

If your budget is limited, the main reference you choose may be pixels. In any case, I suggest you choose a product with a pixel size of more than 3 million, so that your digital camera can still print photos by itself in the future trend of photo printing.

In addition, because most ordinary users don't know much about photography, auto-focus system, automatic exposure and other functions are essential. For ordinary home users, if they are limited to family entertainment and pay great attention to practicality, then powerful functions and high cost performance brought by durability are the first choice factors. At present, the dominant 3-megapixel and 5-megapixel models in the market can meet the imaging requirements. A variety of shooting modes, a wide range of ISO values and high-speed and accurate focusing are necessary functional features, and a metal shell that ensures durability is also an essential consideration.

For consumers who pursue fashion avant-garde, the close combination of shape design and prominent function is the first choice standard. Small shape, bright colors and comfortable hand feel are essential, and some highlight functions, such as macro shooting, are icing on the cake for this kind of products.

If you are a professional user, the most important thing is the ultimate pursuit of imaging quality. Manual operation function is necessary. Replaceable lens, CMOS image sensor with more than 6 million pixels and various image recording modes are the guarantee of high image quality. If we have an explosion of less than ten thousand yuan, more professional photographers will flock to us.

The last thing to consider is where to buy it. A regular digital camera sales counter will ensure that your camera is "born". Brand effect should be considered when purchasing, because it is the main guarantee for the overall quality and after-sales service of digital cameras.

In short, digital cameras have a deep IT brand because of their own reasons, so they also have some characteristics of IT products, such as rapid product upgrading and rapid price drop. Therefore, when we buy digital cameras, we must be clear about our own needs, buy as needed, and look at digital websites more!

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According to the individual's economic ability and hobbies, clear the actual needs of individuals.

Next, if you have time, you can read this article:

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