Digital cameras have come into the field of mass consumption, many friends want to have a digital camera, but suffer from not knowing how to choose. As a digital product with a high degree of technological integration, there will be a problem of how to choose how to choose in the purchase process. Now we buy digital cameras are focused on the number of CCD pixels, in addition to the resolution, in fact, the other performance indicators of the digital camera is more worthy of consumer attention, I will tell you how to choose a price from a different perspective, the function of the practical "best digital camera.
One, understand the camera
1. Pixel and resolution pixel is the most basic unit of digital imaging, each pixel is a small point, and the different colors of the point (pixel) gathered into a moving picture, digital cameras are often pixels as a classification basis, but many people think that the number of pixels is the number of light-sensitive points on the CCD photosensitive unit, in fact, this argument is not entirely correct. In fact, this statement is not entirely correct, many manufacturers through special technology, can be in the same light-sensitive points of the CCD photosensitive unit to produce higher resolution digital photos, such as: Fuji's SuperCCD, Epson's HyPic technology. What is the relationship between pixels and resolution? And how to interpret these two numbers when choosing?
★The higher the resolution of a picture, the more pixels it requires, for example: a picture with a resolution of 640×480 requires roughly 310,000 pixels, and a picture of 2084×1536 requires a whopping 3.14 million pixels.
★Resolution can have multiple values, the more resolution the camera provides, the more flexible it is to take and save pictures.
★Picture resolution is related to the size of the image and the magnification ratio at the time of output; the higher the resolution, the larger the image size and the higher the magnification ratio.
The total number of pixels is the total number of pixels contained in the CCD. However, since the edge of the CCD is not exposed to light, a portion of it is not used when shooting. Subtracting these pixels from the total number of pixels is the effective number of pixels. Therefore, when reading the product specification, it is important to note the number of effective pixels that can be used for actual photography, not the total number of pixels.
2. Lenses and shutter lenses directly affect the quality of the camera. Generally, manufacturers with a deep background in traditional cameras will also have better lenses for their digital cameras.
★Focal length due to the lens specifications of the digital camera is relatively special, can not be predicted by this data can be photographed range of scenery, most manufacturers will be in the lens focal length parameters after the increase in the equivalent of 35mm traditional camera focal length value. If it is a travel souvenir or life photos, just buy a fixed-focus lens model, if there is a need for variety, a camera with three times or more optical zoom capability will be more suitable. Focal length, also known as focal length, usually refers to the length of the distance from the center point on the lens axis to the time when the image can be clearly imaged, and in the camera refers to the focal length of the entire lens group, in mm (millimeters). The longer the focal length, the narrower the angle of the visible range of the lens, but with the effect of magnification, close, like the lens of a telescope; the shorter the focal length, the shooting range becomes larger, the relative object will be smaller, suitable for shooting a larger scene in close proximity, that is, we often say that the wide-angle lens. For digital cameras, the longer the focal length, the longer the depth of the lens group, in addition to the camera lens can also be found on the f = 5.5mm or 5.5mm and other data, however, as the focal length of the lens of the digital camera is generally a lot shorter than the average 35mm camera, so the manufacturer will more often than not in the instruction manuals indicate something like: equivalent to the 35mm camera's 36mm lens of the words for the user to cross-reference The camera's focal length is much shorter than that of a typical 35mm camera.
★Aperture rangeThe larger the aperture the more adaptable to insufficient light, if there can be more than two aperture values, the camera's application will be more flexible. Aperture is one of the most important mechanisms that affects exposure, and usually refers to a control device that is a combination of about five to nine thin metal plates within the lens group that can form circles of different sizes to control how much light enters the lens. The larger the aperture, the more light enters per unit of time. The size of the aperture is indicated by a number, the larger the number, the smaller the aperture, that is, the less light entering. The lenses are labeled with the maximum aperture of the lens, which is the value of the fully open state, for example: 1:3.2, but on zoom lenses you will see 9.2-28mm1:2.8-3.9 labeling, indicating that the maximum aperture at a focal length of 9.2mm is F2.8, while the maximum aperture at a focal length of 28mm is F3.9.
★Shutter Digital Cameras The shutter can support 2 ~ 1/1000 seconds has been able to meet the general demand, of course, if you can have a wider range of shutter, then more in line with a variety of strict shooting conditions, such as shooting high-speed moving objects or quiet night starry sky. The shutter is used to adjust the exposure time of the camera, the unit is seconds, is expressed in reverse, for example: 30, 250 means 1/30 seconds, 1/250 seconds, 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, general shooting is not easy to shake and lead to blurred images, but the speed may lead to a lack of light intake, usually high-speed shutter must be used when the light is strong, or will be aperture with the enlargement. When the light is low, a slower shutter speed is more suitable, but may require the assistance of a tripod.
3. Macro shooting macro is to be photographed to bring the subject closer, zoom in, the focus is on the tiny objects shot into the size you want, in macro mode, a variety of digital cameras have different capabilities, some can even be as close as 0.1 centimeters or so to close up the shot.
4. Other FeaturesOther features such as red-eye flash elimination, white balance, and exposure compensation will be more flexible for shooting in various environments.
★Auto White Balance CorrectionThe light-sensitive part of a digital camera is equivalent to the negative of a traditional camera. The light-sensitive element of a digital camera is fixed, so it needs to be corrected with the help of the white balance correction ability to respond to the changes produced by the light source. It is designed to work with varying degrees of light sensitivity in different environments. Different light sources produce different degrees of color deviation, which may result in bluish or yellowish colors, which can be corrected by white balance correction.
★Exposure Compensation As the camera's automatic exposure function compares the amount of light entering the camera with the amount of light reflected in the gray, if there is too much white in the picture, the amount of light entering the camera will be higher than the standard value of the metering, and the camera will be misled into thinking that the light is very bright and narrowing the aperture, resulting in underexposure of the photo, and the white portion will become insufficiently white. Exposure compensation addresses this situation by increasing the exposure by 1 or 2 stops in order to get a bright, correct image. On the other hand, in the case of mostly black images, the exposure needs to be lowered by 1 or 2 stops.
Many consumers, because they don't know what a digital camera is, think that a higher pixel count is better. This is not the case. When choosing a digital camera, it is important to take into account both its digital and optical characteristics.
1, digital camera lens. Good design of high-grade camera lens consists of multiple groups of lenses, and contains aspherical lenses, can significantly reduce the color cast and maximize the suppression of graphic aberrations, distortion, material selection of expensive fluorite or glass to do the lens. And home and semi-professional camera lens to reduce the weight and reduce costs, the use of resin synthetic lenses.
2, digital camera CCD like value. CCD is the heart of the digital camera, but also affects the manufacturing cost of digital cameras is one of the main factors. Thus, it is also an important criterion to divide the grade of digital camera. At present, the entry-level is 3-5 megapixels level products, while commercial and semi-professional users tend to 5-10 megapixels above the product.
3, digital camera zoom. Optical zoom is a real zoom that doesn't affect the image quality of the photo, while digital zoom is an electronic zoom that is a localized enlargement at the cost of losing the clarity of the photo.
4. Digital camera battery and power consumption. Digital cameras have LCD monitors and built-in flashes, so they consume more batteries than traditional cameras. The use of 5-cell batteries is cheap and readily available, but the batteries are dead before long. Therefore, it is best to choose a model equipped with rechargeable lithium batteries, which are now designed into mainstream digital products, as well as a full range of charging devices as accessories.
5, additional features. The more features you have, the more fun and versatile your digital camera will be. For example, many digital cameras have a video output function, which can be connected to a TV to browse photos; some can be set up like a cell phone to open the picture and shutter sound; some can have a short digital video recording function. The installation of the driver of the digital camera should be very easy, and be able to quickly download pictures, have a photo preview, and so on. For example, the software that comes with a Canon digital camera is very complete, allowing you to categorize and manage your pictures, print them with a variety of settings, and modify them in a simple way.
The image sensor is the decisive factor in camera performance. In general, the pixel value of the image sensor should be larger than the maximum pixel value of the actual image. Some manufacturers use software interpolation to increase the pixel value of the image in order to make up for the lack of pixels in the image sensor. In fact, this interpolation method can be realized in almost all image processing software, and therefore is of little practical significance. In fact, this interpolation method can be implemented in almost all image processing software and is therefore of little practical importance.
Digital cameras record photographic information on a semiconductor element called a CCD (charge-coupled device), rather than on the film of a silver-salt camera.The size of a CCD, like that of a television, is the diagonal length, expressed in inches, such as "1.27 inches (note). "The larger the CCD, the more pixels there are, and the higher the sensitivity. The larger the CCD, the more pixels and the higher the sensitivity. The larger the CCD, the more pixels there are, and the higher the sensitivity. Therefore, the larger the CCD, the better the picture quality for the same number of pixels. -CCD size 1/2.7 inches (4.0mm × 5.3mm) 1/2 inches (4.8mm × 6.4mm) 1/1.8 inches (5.19mm × 6.91mm) 2/3 inches (6.6mm × 8.8mm) Note: 1 inch is equal to 2.54cm, the CCD of the digital camera, the use of television tubes and the same way of expression.
Two, four basic principles of purchasing a camera
●For the average home user, if it is limited to family entertainment, but at the same time very concerned about the practicality of the words, powerful features and durability of the cost-effective is the first factor. The 3 and 5 megapixel models that dominate the market today can fulfill imaging needs, while multiple shooting modes, a wide range of ISO settings, and high-speed and accurate focusing are necessary features, and a metal casing that ensures durability is also an essential consideration.
●For those who are looking for fashion forward, a close combination of form factor and highlights is the preferred criteria. A small form factor, bright colors, and a comfortable feel in the hand are a must, while certain highlights such as macro shooting are the icing on the cake.
● If you are a professional level user, the most important thing is to pursue the ultimate image quality. Manual operation is a must, interchangeable lenses, more than 6 megapixels CMOS image sensor and a variety of image recording modes is a guarantee of high image quality, and if you have a very explosive price of less than 10,000 yuan sets, will make more professional photography enthusiasts rush.
●The last thing to consider is where to buy. A proper digital camera sales counter will guarantee the "origin" of your camera. Consider the brand name effect when buying, as it is the main guarantee for the overall quality and after-sales service of the digital camera.
Three steps to prepare for buying a camera
Step 1: Define the use and purpose of the camera
It is very important to determine the use and purpose of the camera, only to understand their own needs, we can be targeted to choose and buy the machine they really need. Otherwise, it is possible to spend a lot of money to buy back the camera, only to find that the function can not meet their own requirements, or too many features simply can not be used. We can think about what we bought the digital camera is used for. For example: some friends buy digital cameras for traveling; some friends hope to learn photography; some friends want to shoot macro photos; of course, there are people who want to take portraits of close-up photos or take photos of their newborn child as a souvenir. All in all, you must spend money in a clear way.
The question of photo output also needs to be considered in advance, taking into account whether you need to develop very large photos or just look at them on the screen. It is through this consideration that we can decide how many pixels we need to buy, if we are just looking at it on the screen, then a 3 megapixel machine will suffice. If it is to be developed and to be 10 inches or more, then we need to buy the camera with as many pixels as possible.
Step 2: Decide on a psychological price
After deciding on the use and purpose of buying a camera, we should decide on a psychological price that we can afford according to our own financial ability, such as 3,000-4,000 yuan or 6,000-7,000 yuan, etc. This will help us save a lot of time and money. This can help us save a lot of time, can be more purposeful in the selection of the time. DC is still a luxury, so we must live within our means, and other people to compare is meaningless, enough is good.
The third step: through a variety of ways to collect information
Preliminary collection of information is very important to allow us to have a certain understanding of the machine we want to buy. There are many ways to collect product information, first of all, many manufacturers launch digital cameras will have certain promotional posters, we can go to the seller to bring to see. Secondly, media advertising is also a very important way, nowadays there are a lot of digital camera advertisements in IT newspapers and magazines, we should pay attention to it. Again, a lot of digital magazines or some newspapers will have a certain amount of space to introduce digital cameras or reviews of digital cameras, we can also buy some to see.
If possible, you can download the manual of the corresponding camera. This is very good for buying a camera: on the one hand, it will make you more familiar with the machine, and on the other hand, it will prepare you for the basic operation of the camera when you buy it. I'm a big fan of reading manuals myself.
Technical information gives us information about how the digital camera looks, what it does, and so on. And it's even more important that we go and look at the actual photos taken. This will give you an idea of the features of the DC you are looking at in terms of color, image quality and so on. This we can go to digital photography website to know.
Step 4: Decide roughly on the model
The collection of product information is very important, which can let us fully understand the characteristics of the digital camera. But just reading this information, we can only have a perceptual understanding, only to actually go to see the machine or even to try some, we can have a rational understanding of the machine. This requires us to go to the mall. We can look at the window or the counter placed in the prototype, the real machine may look different from the photo, perhaps better. We can also look at other people buying the machines and listen to what they have to say. Of course, we can also let the businessman to take the machine out, the actual touch, operation. Machine to see, the price should also ask, ask the price of the time to pay attention to the business offer is usually leave room for counter-offer. There is also to ask the price they reported is the price of the goods or water goods.
Step 5: Choose a good time to buy
Decided to buy the machine, you have to choose the "lucky day" to buy the DC back. I said "auspicious day" is actually to see the right time, the price of digital products change rapidly, so the market judgment is still very important. One thing that is clear is that you should avoid buying before the holiday season if possible. There are bound to be a lot of people buying machines before the holidays, and prices won't be cheap.
Buying a camera on-site must read
When buying a camera we need to inspect it carefully so that we don't buy a substandard product or get cheated by a JS (rogue trader). Here we give a detailed inspection steps, as long as you follow the following to do, there will be no problem:
1. Never pay the money to the JS first, be sure to check the completion of the payment;
2. Look at the packaging is not very old, if it is very old, then it may be replaced by someone else, or is the product of the JS has been stored for a long time;
3. After opening the box to see if the accessories inside the box have been used or obviously disassembled traces; pay special attention to the battery pin place there are no scratches;
4. Check the appearance of the machine. See if there are any scratches on the body, including the lens, LCD, EVF, and casing;
5. Try to take a picture and use the zoom a bit to see if you can get a clear shot from far away and near. If you are not familiar with the machine you are going to buy, you can use the AUTO gear to shoot when you try it.
6. Then take a close look at the LCD and EVF to see if there are any bad spots. You can block the lens slightly with your hand so that you can see a more solid-colored image, or against white and dark-colored paper.
7. The CCD is a key component of the DC, and if there are bad spots on it it will affect shooting. Since it is difficult to see the CCD bad spot directly on the DC, you need to import the image to PC and then look at it. If there is no PC at the merchant's place, it is recommended to talk to the merchant about a certain replacement period, and then go home to test it peacefully;
How to Test Bad Dots
Before we talk about how to test the bad dots, we have to explain what is a bad dot. Simply put, it is a point on the CCD that will never be light sensitive, or the point will always be lit. Usually always on the most cases, and very few cases are not bright. So why are bad dots produced? This has to do with the manufacture of CCDs. Although now the technology has been very developed, but for the CCD still can not guarantee a high yield rate. Just like LCD, there may be defective points. So we need to test the machine after we buy it.
The test for bad spots is actually relatively simple. There are two ways we can test: one is to look at the original image by eye. In fact, this method is more intuitive, but to be careful, or easy to miss the point. The second is to use software to test. Now the most popular bad point test software is DEADPIXEL. Usually sell DC place if there are computers there are this software.
Before the test, we first need to take some all-black photos, general photos can not be tested, this is very critical. For machines with a lens cap, we just need to cover the lens cap to shoot. If there is no lens cap such as Casio, then we can put a thicker piece of paper on a flat table, place the DC lens down and snap the lens on the paper. It is important to note that the light must not be allowed to enter the lens, but also not too hard, so easy to damage the machine.
Parameters when shooting we can set the aperture maximum, ISO 100, as for the shutter, we need to choose 1/60 and the slowest shutter. That is, one shot each at different shutter speeds.
After shooting, we can import the photos into the computer and open DEADPIXEL for testing. After opening this software, we can see the following interface. We click the "Browse" button to select the photos we want to test. Then we press the TEST button and the results will appear. If the 1/60 photo test has more than 10 a lot of noise, then still try to change one, otherwise it may affect the shooting.
Check that the accessories are all there, usually in the box there is a list detailing how many random accessories there are against which we can count.
Accessories
When we buy a DC, we need to buy certain accessories so that we can shoot better. Accessories are actually quite important and if they are not bought properly then it may affect our normal shooting. Usually we may need to buy memory cards, batteries and chargers, UV and adapter rings, camera bags, tripods and so on. Some people like to buy all at once when they buy a digital camera. I think if you buy these at a place that sells DCs, it definitely won't be cheap in terms of price. Except for memory cards, you should go to a specialized photography equipment store to buy other things, so that not only the quality is reliable but also the price is cheaper. Below we will talk about what you need to pay attention to when buying these accessories in different categories.
Memory card: When buying a memory card, you need to take into account the amount of shooting you do on a daily basis and combine it with your own DC to determine the capacity of the card you need to buy. Secondly, we need to consider the brand of the card. There are many brands of cards on the market, and the brand of the card determines the quality of the card in a sense. For example, Kingston (kingstone) CF card, Toshiba (TOSHIBA) SD card this brand of card, although the speed is not very fast, but the quality is absolutely first-class, compatibility is also good. Again, we have to consider the speed of the card. Nowadays, there are two kinds of cards sold, normal speed and high speed cards, if you need to take photos in RAW or even TIFF format, then try to buy high speed cards.
Batteries and chargers: There are generally two types of batteries used for DC, one is rechargeable lithium battery and one is AA (#5) NiMH battery. For rechargeable lithium batteries, my advice is to go to a regular store to buy, on the one hand, there is quality assurance, on the other hand, also buy the probability of counterfeit goods is not less. Nickel-metal hydride batteries GP Super Battery is not very expensive, and the quality is first-class, of course, the national products are not bad. We try to buy a larger capacity, such as 2000mAh. For the charger, now many digital cameras are randomly given, here will not be detailed.
UV and adapter ring: The main function of UV for digital cameras is to protect the lens. Whether or not you need to buy this, I think it first depends on what kind of machine you're using. If the machine is relatively compact, then it's better not to consider it. Because usually the UV depends on the adapter ring or adapter barrel to be mounted on the machine, which increases the size of the camera. If the machine itself is large, such as the Canon EOS350D, in which case it is more suitable. there are many brands of UV, it is recommended to consider the multi-layer coating. When buying a UV we also need to consider the caliber of the UV, if you are not very familiar with this then you can take the camera with you. In addition usually after installing the UV, the original lens cap that comes with the camera may not fit. We need to get another one fitted.
Camera bag: make sure to consider where to put the accessories and take the machine with you to buy it. That way you can buy the right one. Photography bag is not the bigger the better, but suitable is the best. Also pay attention to the material of the bag, try to buy waterproof bag ah.
Tripod: Pick a tripod to pay attention to its degree of stability, do not buy wobbly. Also pay attention to the weight, if you are strong and happen to need to exercise, then this may not be a problem. The most sold on the market is the Weifeng brand, this brand of tripod is cheaper, and things are okay. Imported brands of Japan's Admiral has a long history, many of the top international photographers more choose this brand. The price is not very expensive.
Distinguishing between water goods and licensed goods skills
Often guests ask me how to determine the licensed goods. General licensed goods have obvious signs, the following I briefly talk about:
1. Canon: licensed goods above the box has an anti-counterfeiting mark, scrape off the coating can be a phone query; box, warranty card, the serial number on the body should be the same; Canon's triple warranty card in the upper right corner of the laser anti-counterfeiting stickers, and the warranty card is in Chinese; the manual for the Simplified Chinese version.
2. FUJI: the current sales of FUJI licensed goods have a Chinese menu, if you find the menu is in English, then basically can be identified as parallel imports; licensed goods of the packaging is in Chinese; licensed goods have a simplified version of the manual; warranty card, FUJI's licensed goods to provide a simplified version of the warranty card of the Fuji China, with a triple.
3. Minolta: You can call Shanghai Minolta's toll-free consultation hotline: 8008200077 and ask it to verify the body number.
4. NIKON: Since NIKON does not have a company in China, sales are handled by several agents, which are Quantum, Lida, Bright Pond, and New Kanghua. Each agent of the licensed goods identification method is not exactly the same, but there are still certain ways to identify. The first thing we need to look at is the warranty card, which is in English and stamped with the agent's stamp. The licensed product has a simplified Chinese manual. Some agents such as Quantum have anti-counterfeiting stickers on the box.
5. Olympus: Olympus is now the use of simplified Chinese menus, but there are still a very small number of products or English menus; secondly, the manual and warranty card are also simplified Chinese version; packaging, Olympus is simplified Chinese version.
6. Sony: the licensed box can be found on the Shanghai Suoguang or Wuxi Sony label; warranty card on the words of Shanghai Suoguang; with simplified manual. In the Chinese market sales of Sony DC or DV only domestic, as long as the import is water goods. You can see CN1 on the barcode of the outer package, if it is CN5 then it is water goods.
"7. Casio: customers can scrape the coating on the anti-counterfeiting sticker affixed to the package after purchase, get the password under the coating, through three ways to query:
1. Call 8008108315 free phone query or 010-64219000 query
2. Mobile phone SMS to 80028315 (mobile), 90028315 (Unicom), 90028315 (Unicom), 90028315 (Unicom), 90028315 (Unicom), 90028315 (Unicom), 90028315 (Unicom). 90028315 (Unicom) query"
Note: Nowadays, many good digital camera brands have their own websites, as long as you log on to the corresponding website, enter the body number, it only takes a few seconds to know whether the DC or DV you buy is a licensed product or not. If you are bringing a DV or DC from abroad or from Hong Kong or Macau, it is better to ask whether there is a warranty in China. As far as I know, except for Panasonic, other brands have no warranty in China, and Panasonic does not have warranty for all products in China. Nowadays, most of the domestic repair departments are contracted, and without a proper warranty, the repair fee is incredibly high.
Be careful when buying a digital camera
High pixel equals high quality photos?
Many first-time digital camera buyers consider pixels to be the primary factor in determining the quality of a digital camera, and it seems that a high pixel count digital camera will inevitably result in high-quality photos, but the truth is that the relationship between pixel counts and quality is far from simple.
What is certain is that pixel counting does not determine quality. There are many factors that affect the quality of a digital camera, and the one that directly affects imaging quality is the lens, which is one of the most important elements of both optical and digital cameras. Ordinary digital cameras use CCD for light-sensitive, its area is much smaller than the area of the traditional film, which requires a more stringent resolution of the lens, otherwise, even with a high number of pixels, the imaging quality will still be poor because of the lens. In other words, the resolution of the optical lens used in a digital camera must be better than the resolution of the CCD, so choosing a digital camera with a high-quality lens is much more important than just looking at pixels.
Clean images with low noise are always accompanied by high resolution?
Noise is the enemy of image quality in digital cameras, and users are under the impression that a clean image with low noise always means a high-resolution photo, but in fact the situation is not that simple for digital cameras. As the digital camera image sensor type is very single, just CCD or CMOS, which means that the signal of each other's image engine are relatively close. But the post-processing of image data has created a difference in style between different brands and different series of models, and this is the embodiment of the core technology of each manufacturer, especially in the degree of research and development of noise reduction technology on the resolution of the high and low impact.
The higher the ISO, the louder the noise?
Slightly more experienced digital camera users in the shooting of sports objects, or shooting in dark environments, sometimes using high sensitivity settings to shoot at high ISO values, the shutter speed is faster, easier to shoot, but the high sensitivity of a problem is that the picture noise will increase, in fact, this is a dilemma that many digital camera users feel quite a headache! In fact, this is a dilemma for many digital camera users. With low sensitivity, it is not easy to shoot with less noise, and with high sensitivity, it is easy to shoot with more noise. Generally speaking, the use of high sensitivity to shoot photos we have to reduce the resolution to enjoy, and this time the noise on the photo is not so obvious, a simple analysis of this is because after the reduction of a pixel on the image of a pixel by the original more than one pixel after the merger of the original, in other words, is to turn the three noise into a noise, which is not a very strict explanation, but it can help us to understand the phenomenon.
How many pixels in each camera work best at high sensitivity settings is a matter for the user's own practical experience. Let's make an analogy, if they are all set at ISO400, a 2-megapixel digital camera with a 640x480 resolution will have the least amount of noise, while a 5-megapixel digital camera with a 1024x768 resolution will have the best results. will be able to get good results.
The higher the number of CCD pixels, the faster the focusing speed can be?
Let's take a look at earlier digital cameras. Because ordinary digital cameras had to read the CCD imaging signal when focusing, focusing and response speed used to be a permanent pain in the heart of the first generation of high-pixel-count digital cameras. The increase in pixels means that the amount of data per reading of the CCD signal also increases, focusing, metering, LCD display and other subsequent processing also carries a heavy burden. As a result, we often see that digital cameras based on the same hardware platform are often faster than their higher pixel counterparts.
Lithium batteries, with their high energy density and compact size, are the preferred choice for powering digital cameras?
We first need to understand what is the major power consumers in digital cameras, LCD screens, flash, image sensors, and processing engines are major power consumers, and basically belong to the burst type, just in the work of the moment requires a large current, the usual static current is very small. This determines the power consumption characteristics of the digital camera, the need for power supply with sudden high current power supply capability. From this point of view, the lower internal resistance of the battery is more suitable for digital cameras, it can significantly improve the response speed of digital cameras. Analyzing the average flash charging time, cameras with lithium batteries are far ahead, usually taking only 3 seconds, while models with nickel-metal hydride batteries tend to take longer than 6 seconds.
But when it comes to capacity, lithium batteries no longer have a clear advantage to speak of. In 2005, more than 2,000mAh NiMH batteries have been introduced, while the lithium battery capacity of ordinary digital cameras is often around 1,000mAh. And the use of general-purpose nickel-metal hydride battery digital camera, you can always buy emergency batteries, or at any time to use someone else's charger to charge, rarely due to battery depletion of embarrassing scenes. Using a special charger, the charging time is often less than 4 hours, directly after the lithium battery. The NiMH battery's abundant energy and nearly 1,000 charge/discharge cycles make it the most cost-effective digital camera battery available.