So, what is a digital camera? What are the differences between a digital and an ordinary camera? The difference is that this camera does not have a film; the light, after passing through the lens, falls on the photosensitive matrix (it may be several), it transforms it into signals, digital signals, from which the image is obtained and stored in digital form in the storage of the device (such as memory card); using the show, you can view it and erase at will. The main advantage is the ability to transact with photos, you can make a huge amount of photos; it all depends on the camera’s memory.
Any digital camera has a slot for a card, you can delete unwanted pictures and take pictures again, not caring about film. Yes, the first digital camera made photos of not always desirable quality, but modern cameras far removed from film ones.
Digital SLR cameras – what is it? This is in fact nearly the same as a digital camera. The difference is that inside this camera a special mirror is located, which receives light reflected from it on the matrix. The light falls directly through the objective, and in the digital camera it goes through the auxiliary port.
An vital advantage is the absence of such an effect as parallax. Parallax – is the change of apparent position of the object relative to the remote background, depending on the location of the observer. The interchangeable lenses are also supported. Nowadays there are many manufacturers of digital and “SLR” cameras; the most well loved ones are Canon, Casio, Nikon, Olympus, Panasonic, Sony and others.
Digital cameras have made a kind of revolution in photography. The cost of each individual frame is considerably reduced, which allows the person, when taking shots, not to worry about that the film can over. Digital cameras let you view your footage immediately after shooting and, if necessary, either delete a failed frame from the camera’s memory, or, for example, duplicate a frame.
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Choosing a professional camera – is one of the main criteria for the success of your photo business. Today’s market of digital photography is represented by a huge number of camera models of a wide variety of brands. They all have different ranges of included features and quality of the images. But, among this diversity we often hesitate to choose and choose for a long time what to buy – SLR camera or a regular “compact.” In such a situation the professionalism of the photographer is of fantastic importance – how well he knows how to deal with photographic equipment and maximize its opportunities.
If you are going to buy a digital camera, come primarily from the goals that are in front of you. For example, if you are a professional photographer – shoot weddings, anniversaries, shoot in the studio, etc., the preference should be given to SLR cameras. Currently there is a large selection of “SLR” cameras in selling for relatively reasonable prices. Many professionals of photo business find it acceptable to choose for this purpose the SLR camera from five hundred dollars or more.
If the focus of your business will be shooting photos for documents, it is enough to buy a cheap “compact” camera with a resolution of ten megapixels. Having picked up the best lighting and using a special editor for preparing photos for the documents, you will be able to get fantastic shots. For example, the program Photo for documents Profi from AMS Software is ideal for this purpose.
Choosing a professional camera, you have to determine with the manufacturer. At the current market of photographic industry the indisputable leaders are such companies as Canon, Nikon, Sony, Pentax, Olympus, etc. Each of the companies offers different models of cameras from the simplest to the professional “SLR.” They all have a certain range of features that affect the quality of the images.
There are plenty of other models of professional cameras of different brands. But, when choosing a professional camera, above all, be guided by your goals, as well as by opinion of those who have already achieved success in the photo business.
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Tablet computers have the same functions as a laptop has. The difference is the tablet computers generally do not use keyboards and mouse. The modern tablet computers have finger touch screen for quick and simple navigation. Users can even write on the screen with the help of a stylus or a pen. Most of contemporary tablet computers have writing recognition feature.
In this way users can make written notes and then convert it to the text format. Some tablet computers do not have finger touch option and you need to navigate it with the help of a stylus. Keyboard can be easily connected to the tablet PC if it is needed.
But the main advantage of tablet PC is that it can work without a keyboard. The virtual keyboard is on the screen. You can use a tablet computer even while you are standing and making some other things.
Tablet computers can be successfully used instead of desktop computers and laptops. Tablet computers are in an evolving trend now and a lot of well loved computer companies are producing these PCs. Tablet computers are designed in various kinds and can be different in performance and technical characteristics.
There are a lot of functional and quick tablet computers that can substitute a laptop entirely. Tablet computer models are also different. The most widespread types are rugged, convertible and slate models available on the market. Tablet computers are developing progressively that is why a lot of software applications are made specifically for tablet computers. Tablet computers are produced to be quick, effective and light weight.
Despite its small size, portability and weight tablet computers have high memory and effective processor. Tablet computers have all the needed options such as USB ports, web camera and Wi-Fi. Tablet computers are perfect for internet browsing and entertaining. You can watch movies, listen to music and write e-mails. Tablet computer is a perfect tool for bloggers and content editors.
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Today we will talk about the creation of tablet PC. Throughout the history of the portable computer designers were constantly searching for the most suitable solution that would allow working with it on the road. And according to this they had to deal with the controversial task. On the one hand, it is necessary to ensure lightness and compactness of the system so that you can use it literally on the run, on the other – to produce the most diverse information input, including typing.
Until now, the problem of handwriting recognition required significant computing resources, so that all previous attempts to implement such functions in portable computers have failed. This was connected both with the lack of sufficient productive mobile processors, and the fact that emerging platforms were closed. Because of this, a large number of programs that can take full advantage of pen input were not to be recruited, which, in turn, led to the unpopularity of products.
But with the release of the operating system Microsoft Windows XP Tablet Edition, and Tablet PCs based on it the situation has begun changed.
The fact is that not only the handwriting recognition is integrated into this platform, but also it supports the function of the so-called digital ink. And any programmer can use them in order to make a program in which the user will enter a text, draw or just play with the touch-sensitive screen.
The applications that can process and store the recordings made by hand can be included in the operating system. Primarily this is Input Panel. It appears during the boot process, and its icon is at your taskbar, so that you can call this program at any moment. The application imitates the normal keyboard, provides a window for handwriting and subsequent conversion to text, and allows you to activate the voice input.
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Currently the market of phototechnique is full of low-cost digital photographic devices that allow getting the photos of decent quality. But, professionals and active amateurs prefer reflex digital cameras, because they are multifunctional and have a higher quality of the images.
What points should be considered?
1. Price. Of course, there are no any restrictions in this issue; it all depends on your needs and financial possibilities. For example, if you take photos for documents, do not consider overly expensive options. For these purposes you can choose SLR worth 500-600 dollars. Of course, expensive cameras have a number of additional advantages, but in this case, you will not use all of their functional.
2. Matrix. This is a semi-conductor plate, which includes many light-sensitive cells (pixels) that form rows or columns. First of all, we must pay attention to such characteristics as the matrix resolution, size and sensitivity. Resolution is measured in megapixels, and reflects what number of cells the matrix consists of. The higher the resolution, the higher the quality of the images is.
3. Lens. It is characterized by photo power, which determines the quality of the images. The sharpness, clarity and lack of distortion in the picture depend on the characteristics of the lens. Objectives are divided into wide-angle and long focus. The first ones have a long focal length and are ideal for landscape photography. Long-focus lenses are used mainly for shooting distant subjects.
4. Optical image stabilizer. This is a special device, which eliminates image blur due to shake of hands when taking pictures. Therefore, before choosing a SLR camera, remember that there are two options for image stabilization. Some manufacturers have inserted the stabilizer inside the lens (Canon, Nikon), others use the stabilization based on the shift of the matrix – inside the camera (Sony, Pentax, Olympus). The latter option is more convenient because you can work with any lens.
In addition to all the above, pay attention to the appearance of the camera, its design and quality of housing. In addition, we recommend you selecting a reflex camera only in specialty store. You can get a professional advice and get a reliable guarantee for the use of your SLR camera.
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Choosing a digital camera as other equipment is done by examining its technical characteristics. It will not be superfluous to hear reviews of current owners of cameras, as well as to compare the images made by different cameras at the same time in the same place. But at this point we will discuss the technical characteristics, as they determine if the camera will be able to give you a colorful picture.
There is a view that the more pixels, the better the image quality is. It is erroneous opinion and misleads many people. This characteristic is responsible for a maximum resolution of the photo that you can make by a device without losing quality. It is vital to consider the size of the matrix, on which there are these pixels. Therefore, an amateur camera may have more megapixels than a professional one.
Picture quality depends on the matrix – a unit with a certain amount of photosensitive elements (pixels). It is responsible for color rendition, noise, transmission of small details, and depth of field. The number of pixels does not always correspond to the resulting image.
A serious approach should be to the choice of optics. First look at such an option, as zoom: it may be digital or optical. Excellent cameras have both, but cheap cameras have only a digital zoom. Digital zoom is accomplished by increasing the frame after the shooting and cutting it to the necessary size, thereby losing quality. The optical zoom is implemented using the change of focal length of the lens.
Digital cameras without flash are not suitable for use in low light conditions. Cheap models are equipped with built-in flash, which is somewhat helpful, but sometimes, conversely, can give an excessive light. In such cases it is advisable to use digital cameras with a pluggable external flash.
The main thing when choosing a digital device is to determine for what purposes you buy it. And on this basis you should choose what characteristics are vital for you.
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SLR cameras have appeared long ago, but now it goes not about the history of cameras, but namely digital “SLR cameras” as they are commonly called. Why are they called reflex? Everything is very simple – the design of this camera includes – a mirror. Thanks to it we can see the image before making the frame.
The design of all SLR cameras is the same: the light passing through the lens comes on the mirror, it is reflected and gets on the prism, and you see a picture. After pressing the shutter, the mirror is raised, and for a split second the shutter opens through which the light is imprinted on the photosensitive matrix – the heart of every digital camera. Then the image of the matrix is stored in flash memory for the later use – everything is simple!
So, what is the difference between “SLR” and usual camera. At first glance you can see the difference only in sizes, but this is only for lovers of photography, but in fact the main difference is in the absence of the same system with a mirror.
The fact is that conventional cameras are arranged much simpler then reflex cameras: the light passing through the lens immediately gets into the matrix, so you can see the image on the screen at once. But due to the fact that the light hits the matrix continuously – we have too much light, and the camera has to “filter” the image, that is to impose all sorts of filters – brightness, contrast, gamma, color saturation, and this is not the entire list! Thus we have not a real image, but only the image that the camera sees.
Of course, it is not necessary to reckon that usual cameras are terrible, their main advantage – is the compactness and ease of use. SLR cameras are hard to manage and configure, even in automatic modes, so they are used by professional photographers. For the average layman it is enough a usual camera.
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In fact, tablet PCs offer a new computing experience for their users and this is one of the reasons why these computers are so well loved these days. After an initial acquaintance with tablet PC users started to realize the features that they would want their tablet PCs to have. And thus, manufacturers, trying to answer to consumer needs, started to integrate different features into those tablet PCs. And this is a reason why it is necessary for you to determine all your computing needs before you really buy one of the tablet PCs.
First of all, while choosing the best tablet PC for you, it is necessary to check its mobility features. Traditionally these mobility features include its weight, size and wireless connectivity. Remember that these computers are designed for the mobile market and thus it would not be all that practical to choose a one that could not be able to measure up to the stringent requirements that are desired by users.
In fact, when it comes to wireless connectivity, it would be a fantastic thought for you to opt for tablet PC that offers Bluetooth, Wi-Fi and 3G connectivity. Even if you want to have only Wi-Fi to be connected to the internet, it would be a real advantage for you to have a tablet PC with Bluetooth and 3G capability.
Today the majority of tablet PCs are equipped with two USB ports, 1.3 mega pixel camera as well as microSD slot. As well, there are some other tablet PCs that feature HDMI output if 10.0″ screen is not enough.
In fact, with time passage more and more features are being added to the tablet PCs in order to extend their functionality and provide a unique computing experience to users. And thus, if you are in the market for a new tablet PC, then it is much better for you to choose the latest model which features a lot of the functionalities you need.
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What is the difference between an amateur camera and a professional one? Currently in the development of photographic equipment there has been a significant leap forward and it is very hard to identify the differences between amateur equipment and a professional one. Buying a camera, every amateur draws attention to the price, at the first place, then the manager tells him briskly about the advantages of this particular camera, but in the end will show where to direct, where to look, where to press and it will be enough for a non-professional. Next he will photograph his friends, girlfriends, etc., without hesitation that the portrait is one of the most hard photo techniques.
So, the main difference of professional cameras from amateur ones – is a wide choice of settings that help ensure a high quality of photos. It is such features as: the ability to change the lens, shutter speed, frames per second, the length of exposure, manual control of exposure correction, automatic bracketing; now there are cameras with the ability to photograph in HDR mode.
Types of viewfinders.
The viewfinder serves to target the camera on photographed objects. It shows what will be on the image in cases when the boundaries are not determined on the ground glass (the camera does not have a matte or photography is executed not from a tripod).
Viewfinders are framework and optical, which are divided into cross-cutting, mirror and electric.
The most convenient are framework viewfinders: a camera is held at eye level that contributes to a more conventional transmission of visual perspective.
A frame viewfinder consists of two frames: small and large in the format of a negative; they are separated from each other by a distance equal to focal length of the lens. The framework viewfinder gives an image in its actual size and very comfortable for viewing.
The mirror optical viewfinder consists of two collecting lenses, one of which is smaller, placed vertically, and the second, larger – horizontally at the top of the viewfinder; among them at the angle of 45 degrees to both lenses the mirror is attached that reflects the upward rays passed through a smaller lens. As a result, large lens forms an inverted mirror image of your subject.
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A camera – is a device with high accuracy, which combines elements of digital electronics, precision mechanics and complex optics.
If you use it properly, comply with the manual instruction that came with your camera and protect it from mechanical hurt and contamination, it can work for many years without repair.
You should keep the camera in a hard cover, which protects it from both dust and dirt, and from mechanical impact.
When sharp bumps, dips or other mechanical forces some of the components and parts in the camera may be hurt – in the first place, the lens and the show (LCD).
Dust and sand, which penetrate into the camera, cause premature wear of the rubbing surfaces of the lens zoom mechanism. Tiny grains of sand, falling on the gear teeth of shutter and aperture, focus and zoom motors, often lead to jamming of the lens, and often incapacitate the photo camera.
The camera cannot be stored in a damp location, as the moisture causes corrosion of metal parts, printed circuit and electronic components, resulting in hurt of optics and antireflection coating of optical lenses.
We do not recommend using the camera in a terrible weather. If drops of water accidentally hit the camera, you should erase them immediately after photography.
Don’t expose the device sharp fluctuations of temperature. In winter, when the camera is brought from the street into a warm room, moisture is condensed on the surface. Therefore, you should not open the pouch and remove the camera as long as it does not warm up to room temperature.
When the camera fell into the water, especially in the marine, you should immediately remove the batteries and dry. After that you have to go to a specialized camera repair shop for cleaning circuit boards and other nodes of the camera with special solutions to prevent further corrosion.
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Today tablet PCs are considered to be the best portable devices. These devices allow users to catch up with news channels, their favorite movies as well as read their manuals as they send web mail, play games and listen to music among many other things.
Modern line tablet PCs support the majority of computer based applications. They look like touch tablet PCs. This means that the latest state of these computers are simple to use portable devices, but for people who have had no chance of using previous versions of touch screen devices.
The companies manufacturing the slate tablet PCs had no intention of making hand-help portable devices as replacement for notebooks, but still the latest top of the range tablet PCs have some fascinating and useful applications. In simple words, the slate tablet PC is an improved version of previous versions of the tablet PCs that have a larger viewing show. Large viewing show features on the simple to go around with computers allow people to use the convenient tablet PC as they would their desktop computers. Today tablet PCs have a keyboard that appears on the screen when a person needs to type the text. The best tablet PCs which are considered to be the top of the range are manufactured by some of the most respected brands in tablet PC industry.
But, it is necessary to mention that far not all slate tablet PCs are designed to be used as mobile phones. If you travel a lot in business or just for pleasure, then tablet PC can be useful for you.
If you want to buy one of tablet PCs, then you have to consider the PC’s quality and design. Now you know what to look for when purchasing a portable computer, but it is only up to you whether portable computer is the best option for you to opt for.
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The tablet PC is not a new phenomenon on the market, but only in recent times it has been extremely well loved. The first tablet PCs were extremely heavy and the battery lasted for a couple of hours, but these days everything has changed. And thus there are several reasons why you have to consider tablet PCs:
- First of all, tablet PC is a real computer. Today the majority of people use computers only to browse the internet and watching different videos. And thus with tablet PCs you do not have to sit in front of your desktop computer, but you can do all these things when and where it is convenient to you.
- It feels natural. In fact, using touch screen feels much more natural than using a mouse. And there is no learning curve involved. Even kids may easily operate tablet PCs.
- It is quick. In fact, in some ways the tablet PC could be quicker than a desktop computer when browsing the internet.
- Video chat. Of course, desktop computers could do video chat as well, but in case of tablet PC it is an simple task to accomplish.
- eBooks. Modern tablet PCs allow you reading thousands of different eBooks and thus there is no need to buy eReader.
- Applications. With the application store your tablet PC could turn into anything you want. It could be a camera, a book, a turntable, a magazine or anything else.
- Ergonomics. It is simpler for your eyes to use a tablet PC because you can adjust the angle by shifting your arms. As well you can use it by lying down or while walking.
- It is much cheaper. In a few years the price of tablet PCs will come down greatly. Of course, you can buy a laptop for a couple hundred dollars, but a tablet PC can offer you much more.
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Portable computers are developing very quick at the present time and manufacturers try to make portable computers more advanced and effective. Tablet computers are comparatively new to the contemporary market and these devices are pretty well loved today. This niche of computer devices are developing and the demand for tablet computers is rising.
The prices for portable tablet computers are very competitive and that makes these devices very attractive. Tablet computers are very perfect devices for people who want the portability, entertainment and light weight from computer devices. The prices for such tablet computers are comparatively low.
These computers provide essential functionality and can serve as laptops and portable touch screen devices. This is the main trait of contemporary tablet computers. Earlier version of tablet computers could be used with stylus only. Contemporary devices work as finger touch screen computers to provide higher convenience. These devices are perfect for a lot of tasks, but the main purpose is entertainment and portability.
These devices are perfect for internet browsing, e-mail writing and so on. The latest models of tablet computers include handwriting recognition, and this makes these computers very convenient for making vital notes. This handwritten information can be easily converted to typed text.
You can also work with graphics and charting using tablet computer. Portability and light weight makes these devices to stand out from other computers. Tablet computers can be easily used anywhere. The best feature of tablet computer is that you can use as a tablet and as a laptop. There are different tablet computer that are available on the marketplace today.
Tablet computers differ in technical characteristics and you need to choose the one you need. You should do your research to choose tablet computer that will meet your requirements and your budget. If you need handwritten recognition you should choose particular models of tablet computers because not all tablet computers have this option.
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Today it seems that everyone wants to buy a cheap and affordable tablet PC. In fact, there are a lot of choices for you available on the market and thus it is necessary to determine what you have to consider:
- First of all, you have to reckon about why you need tablet PC and for what purposes you will use it. Probably you need it for your work purposes or for entertainment or for both. If you have to do a long typing job, then you have to consider newer and more effective tablet PC with a detached keyboard. But if you are a designer and you need a tablet PC only for drawing, then iPad is the best thing for you to choose. And if you browse the internet quite often, then Android tablet PC is right for you because it supports flash.
- The other thing that you have to determine is what size of the screen would be the perfect one for you. You have to know that as a rule, all tablet PCs come in two sizes – 10″ and 7″. If you want to use your tablet PC to check your email, read eBooks and play different mini games, then there is no need for you to choose 10″ tablet PC.
At the same time, you have to keep in mind that the larger screen size tablet PC as a rule is more expensive. But, if you use a tablet PC for work, then more likely you have to consider buying one with larger screen since it provides you with a more comfortable experience for long use.
- You have to know that some of the touch screens are capacitive while others are resistive type. Keep in mind that they could affect your navigation experience. As a rule, people consider capacitive touch screen as more sensitive.
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Today a lot of people from all over the globe are trying to know the difference between tablet PC and a laptop. To find out how tablet PC works, it is necessary to know how exactly tablet PCs work.
First of all, it is necessary to mention that tablet PCs were designed to offer people who spend the majority of their time away from their desktop computers an ability to use mobile computers even when they are on the go. Users would make all the needed entries through digitizers or stylus. The portable nature of tablet PCs made them suited for health care workers and technicians.
Today tablet PCs are known as slate tablets and do to their distinctive one piece design. All tablet PCs come with ports for connecting an optional keyboard, printer, mouse, monitor as well as other computer peripherals. By not including all these mentioned peripherals computer manufacturers were able to make the device lighter and prolong the battery life greatly.
Tablet PCs have attracted a lot of people form all over the globe, but still people wanted a traditional keyboard setup. And as a result of consumer demand the convertible tablet PC was made by computer manufacturers. In fact, this type of tablet PC looks as a small notebook computer. Apart from the monitor it functions like a traditional laptop. In convertible tablet PC the monitor can swivel. This ability makes convertible tablet PC a powerful tool for small customer demonstrations and presentations.
As a rule, convertible tablet PCs have a larger viewing screen, larger battery, larger hard drive as well as other accessories. All these extras make tablet PC a more powerful computing platform, but at the same time they make it more expensive and heavier.
If you are a business person or spend a lot of time traveling in business, then convertible tablet PC is a fantastic option for you because it has more features and more power.
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