The Magic Behind Digital Camera

10th December, 2008
digital cameras
Harry Rockwell asked:

A digital camera, as opposed to a film or videotape camera, uses an electronic sensor to transform images (or video) into electronic data. Modern digital cameras are typically multifunctional and the same device can take photographs, video, and/or sound.

In 2005, digital cameras are starting to push traditional film cameras out of many markets. Shrinking device sizes have recently allowed miniaturized digital cameras to be included in multifunctional devices, such as cell phones and PDAs.

Classification

Digital cameras can be classified into several groups:

Video cameras

* Professional video cameras such as those used in television and movie production. These typically have multiple images sensors (one per color) to enhance resolution and color gamut. Professional video cameras usually do not have a built-in VCR or microphone.

* Camcorders used by amateurs. These are a combination of camera and VCR to create an all-in-one production unit. They generally include a microphone to record sound, and feature a small LCD to watch the video during filming and playback.

Still cameras

Digital still cameras are generally characterized by the use of flash memory and USB or Fire Wire for storage and transfer.

Most have a rear LCD for reviewing photographs. They are rated in mega pixels; that is, the product of their maximum resolution dimensions. The actual transfers to a host computer are commonly carried out using the USB mass storage device class (so that the camera appear as a drive) or using the Picture Transfer Protocol and its derivatives.

All use a CCD (for Charged Coupled Device) which is a chip comprised of a grid of phototransistors to sense the light intensities across the plane of focus of the camera lens.

There has recently been some application of a second kind of chip, called a CMOS (Complementary Metal-Oxide Semiconductor) sensor, and this chip is often differentiated from a CCD proper in that it uses less power and a different kind of light sensing material, however the differences are highly technical and many manufacturers still consider the CMOS chip a charged coupled device. For our purposes, a chip sensor is a CCD.

* Standard Digital Cameras: This encompasses most digital cameras. They are characterized by great ease in operation and easy focusing; this design allows for limited motion picture capability. They have an extended depth of field.

This allows objects at multiple depths to be in focus simultaneously, which accounts for much of their ease of focusing. It is also part of the reason professional photographers find their images flat or artificial-looking. They excel in landscape photography and casual use.

* Digital SLRs typically have a sensor nine times larger than that of a standard digital camera, and are targeted at professional photographers and enthusiasts. They resemble ordinary professional cameras in most ways, with replaceable flash and lens components, which give the user maximum control over light, focus and depth of field.

They are also bulkier and more expensive than their casual-use oriented counterparts. They are superb for portraiture and artistic photography because they can be customized for various applications with a comprehensive range of exchangeable lenses.

Professional modular digital camera systems

High-end digital camera backs used by professionals are usually separate devices from the camera bodies which they are used with. (This is because most of the large- and medium-format camera systems in professional use at the time that digital capture overtook film as the professional’s medium of choice were modular in nature, i.e. the camera body had multiple lenses, viewfinders, winders and backs available for use with it to fit different needs.)

Since the first backs were introduced there have been three main methods of “capturing” the image, each based on the hardware configuration of the particular back.

The first method is often called “Single Shot,” in reference to the number of times the camera’s sensor is exposed to the light passing through the camera lens.

Single Shot capture systems use either one CCD with a Bayer filter stamped onto it or three separate CCDs (one each for the primary additive colors Red, Green and Blue) which are exposed to the same image via a beam splitter.

The second method is referred to as “Multi-Shot” because the sensor is exposed to the image in a sequence of three or more openings of the lens aperture. There are several methods of application of the multi-shot technique.

The most common originally was to use a single CCD with three filters (once again red, green and blue) passed in front of the sensor in sequence to obtain the additive color information.

Another multiple shot method utilized a single CCD with a Bayer filter but actually moved the physical location of the sensor chip on the focus plane of the lens to “stitch” together a higher resolution image than the CCD would allow otherwise. A third version combined the two methods without stamping a Bayer filter onto the chip.

The third method is called “Scan” because the sensor moves across the focus plane much like the sensor of a desktop scanner.

These CCDs are usually referred to as “sticks” rather than “chips” because they utilize only a single row of pixels (more properly “photosites”) which are again “stamped” with the Bayer filter.

The choice of method for a given capture is of course determined largely by the subject matter. It is usually inappropriate to attempt to capture a subject which moves (like people or objects in motion) with anything but a single shot system.

However, the higher color fidelity and larger file sizes and resolutions available with multi-shot and scan-backs make them attractive for commercial photographers working with stationary subjects and large-format photographs.

Webcams

* Webcams are digital cameras attached to computers, used for video conferencing or other purposes. Webcams can capture full-motion video as well, and some models include microphones or zoom ability.

These devices range in price from very inexpensive to expensive higher-end models; many complex webcams have a servo-controlled base capable of tracking facial motion with the help of software.

Interpolation

Image color or resolution interpolation is used unless the camera uses a beam splitter single-shot approach, three-filter multi-shot approach, or Foveon X3 sensor.

The software specific to the camera interprets the information from the sensor to obtain a full color image. This is because in digital images, each pixel must have three values for luminous intensity, one each for the red, green, and blue channels. A normal sensor element cannot simultaneously record these three values.

The Bayer filter pattern is typically used. A Bayer filter pattern is a 2×2 pattern of light filters, with green ones at opposite corners and red and blue elsewhere.

The high proportion of green takes advantage of properties of the human visual system, which is determines brightness mostly from green and is far more sensitive to brightness than to hue or saturation.

Sometimes a 4-color filter pattern is used, often involving 2 different hues of green. This provides a wider color gamut, but requires a slightly more complicated interpolation process.

The luminous intensity color values not captured for each pixel can be interpolated (or guessed at) from the values of adjacent pixels which represent the color being calculated.

In some cases, extra resolution is interpolated into the image by shifting photosites off of a standard grid pattern so that photosites are adjacent to each other at 45 degree angles, and all three values are interpolated for “virtual” photosites which fall into the spaces at 90 degree angles from the actual photosites.

Connectivity

Many digital cameras can connect directly to a computer to transfer data. USB is the most widely used method, though some have a Fire wire port.

Integration

Some devices, like mobile phones integrates digital cameras. Mobile phone cameras are much more sold than standalone digital ones.

Storage

Digital cameras need memory to store data. The higher one goes in pixel size, the more memory will be needed. Cameras use a removable memory card to store data, but the cheapest and smallest cameras may simply use fixed internal memory instead. Some cameras come with inbuilt memory as well.

Autonomous devices

An autonomous device, such as a PictBridge printer, operates without need of a computer. The camera connects to the printer, which then downloads and prints its images. Some DVD recorders and television sets can read memory cards too.

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Canon Digital Camera: Get the Best Cameras From the Leading Brand

8th December, 2008
digital cameras
Jayson Pablo asked:

In the past, cameras were considered as luxury devices. There were old technology devices with which we had to wait till the whole camera film was consumed. After that we had to wait for a few days more till the film could be developed. But these days, there are hi-end cameras which allow us to capture and view pictures instantly. The user can even delete them if he does not like the picture. They have become an essential device to carry on a trip.

Everyone wants to memorize his or her past times. The constant improvement of technology has bought digital cameras into existence. With these superb devices, we can remember our good times when we had lived happily. They have become a passion for everyone. There are a multitude of companies in the markets which manufacture a huge range of video and hi-end cameras.

Canon is one of the popular manufacturer offering a superior range of digital still and video cameras. They offer high-quality features and tools delivering premium quality and performance. The user can view lively images captured by them. The mind blowing categories of Canon digital camera offer superior functionalities and performance. These categories include digital compact cameras and digital SLR cameras.

The first Canon digital camera came in 1996 which was titled PowerShot 600. Gradually, it introduced various digital camcorders. Canon continues to provide its consumers with superb technologies at cost-effective prices. Some of the top rated Canon digital cameras include Canon Powershot A590 IS, Canon Powershot SD 1100 IS, Canon PowerShot SD40 Digital ELPH, etc.

The Canon Powershot SD 1100 IS features 8 mega pixels camera with 3x zoom, image stabilization and auto focus for capturing perfect shot. The Canon Powershot SD950 IS offers features like 12 mega pixel, 3.7 optical & 4X digital zoom, 2.5″ LCD display, image stabilization, auto focus and a secure digital memory of 32 MB.

If the user likes to shoot quality images, he can find various brands at the online shops. Buying a Canon digital PowerShot S2 would be a great idea as it comes with the latest features. Some of the amazing features of this device include an optical image stabilization, a rotating LCD, USB 2.0 high speed support and Secure Digital memory cards instead of Compact Flash cards. All the advanced features of these hi-end cameras make them an essential part of our life. The user can find portable cameras in various brands. The popular compact powerful cameras are really easy to use and possess amazing features.

If the user is shopping for these cameras, he may be confused by seeing such a wide range of brands and features available in the market. Selecting the right camera can be an exhausting experience. When the user searches the online shops, he can find every manufacturer offering different types of cameras to choose from. Shopping online for cameras can be amazing if you get the right price with cost-effective deals.

Canon offers high quality products with cutting edge technologies and is amongst the most familiar and finest cameras in the market. This manufacturer is a leader in the compact digital camera class. They come with brilliant products at very competitive prices. The user can find a full range of high quality accessories too in their vast range of products.

Click outstanding digital photographs at the click of a button. Find a vast range of camera styles and features which satisfy all consumer requirements and makes their experience an amazing one. Canon designs and markets these powerful cameras with excellent range of features both for the novice and serious photographers. The fact cannot be denied that these cameras are manufactured with quality and superiority.

Before you select the camera to fulfill your photography needs, browse through the menu options and see if they are intuitive or not. Research on all the latest models and then select your favourite one.

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History And Type Of Digital Cameras

5th December, 2008
digital cameras
Roberto Sedycias asked:

A digital camera is such a camera that will take either video or still snaps digitally. It records the images digitally on a light-sensitive sensor. Some digital cameras can take still snaps as well as video and audio. The digital cameras have become very popular nowadays and more and more people are opting for rather than regular cameras.

Digital cameras are technologically much advanced and have many user-friendly features that are usually not found in regular cameras. One such very good feature is that it displays the image on the camera’s screen just after you catch it. Thus you can click and record millions and millions of pictures, keep the ones you want and discard the others. After the pictures or videos are recorded, you can edit the images and thus can be a virtual master of the background, people etc. Imagine the fun when you can change the background of a picture taken at your home to be changed to a Hawaiian beach, or changing the hair color of your sister to a wild pink and many other things. The choices are unlimited.

Nowadays digital cameras can be incorporated in many devices like PDAs or mobile phones or computers etc. Some astronomical devices like Hubble Space Telescope also use specialized digital cameras.

Digital camera technology has evolved from the similar technology that first recorded television images. It was in 1951 when the first video tape recorder was used to capture live images using television cameras. They converted the information in electrical impulses and saved the information on magnetic tape. It was actually due to NASA`s space technology that used digital images to capture photographs of surface of moon and advanced computer technology that led to major developments in digital photography.

Government was also using this technology in forms of spy camera and the time that being spy satellites and it contributed immensely in advancement of science of digital imaging. Soon private companies like Kodak, Sony etc were releasing professional digital cameras for ordinary people. Their strong marketing tactics worked and today digital cameras are found everywhere.

There are many varieties of digital camera and we will discuss some of them. Compact digital cameras are one of such varieties and are designed to be small as well as portable. The miniature versions are called subcompact cameras. Though they do not have much advanced features or excellent image quality but they are very simple to use and easy to carry around. Images are stored using Lossy compression in JPEG format. Such cameras are generally equipped with a low power, built-in flash usually sufficient for close subjects. Live preview is generally used for framing the photos. They are perfect for casual and home use.

Another type are Bridge cameras that are higher-end cameras. They resemble DSLRs and also share some advanced features with them but just like compact cameras, the photo framing is done with help of live preview and they also have small sized sensors. A Fuji film FinePix Bridge camera is also equipped with super zoom lenses that give you a chance to take very distant shots, though at the cost of image quality.

Another type is Digital single lens reflex cameras that are based on film SLRs or single-lens reflex cameras. These cameras are characterized by the presence of a mirror-reflex system. Other types include rangefinder and are generally used for film cameras, professional modular digital cameras that are assembled from different modular components and used for specific purposes. The common brands for such cameras include Mamiya and Hasselblad.

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Make Your Digital Camera Batteries Last Longer

3rd December, 2008
digital cameras
Roberto Sedycias asked:

Digital cameras, also known as filmless cameras are one of the most intelligent inventions of late. Because before digital cameras, even the most high end cameras were chemical process dependent for photo printout.

But in digital camera, images are recorded electronically by an inbuilt computer. Though initially they were beyond the reach of normal people due to price factor, now they are available in within an affordable range.

Battery is an important component of any digital camera. In fact the longevity of your digital camera depends upon the performance of its battery. First thing to remember is never go in for alkaline AA batteries as they have shorter life span. Always opt for rechargeable batteries called as NiMH. Although they are a bit costly as compared to alkaline AA digital camera batteries, but they can be reused for a long time.

If you are going out on a long trip, it is a good idea to take extra rechargeable batteries. You never know when they will come handy as digital cameras consume power from batteries quickly even if you use rechargeable ones.

While going on a trip, it is also advisable to take battery charger along with you as digital camera batteries may lose their charge over time. Having a charger is helpful especially if u r novice in digital camera photography for you tend to consume more batteries while clicking the perfect shot. Here are some other helpful tips to increase the longevity of your digital camera batteries.

It is always advisable to remove the batteries when the digital camera is not in use. This simple precaution can ensure the longevity of batteries.

Never let your digital camera batteries get wet as water can corrode the batteries and eventually damage them.

You should have prior knowledge about this fact that, if you are using MicroDrive media these miniature hard drives may take up quite more power than Compact Flash cards and hence extra rechargeable batteries are a must.

Turn off your digital camera when not in use. If you are in a situation where you must snap pictures quickly, this may not be a wise suggestion, but if you are in no hurry and can afford a couple of seconds before snapping a still subject, by all means, conserve your digital camera`s energy.

You do not need to stop and take a look after taking photo every time as by doing this does use up your digital camera`s battery power. However, once in a while, it is good to check if your exposure, lightening is perfect or not.

Now-a-days, many digital cameras come with regular viewfinder and an LCD viewfinder facility. While the digital LCD viewfinder has better resolution, it can drain battery power. Turn it off when applicable and use your regular viewfinder for taking pictures.

Try to keep your image playback to a minimum as they can drain out the battery power.

While replacing batteries in a digital camera, it is recommended that their mAh values match. The `mAh` stands for Milliamp Hour is a technical term used while describing how much power a particular battery will hold. It might be possible that one lesser mAh battery will drain before the others, resulting extra strain on the remaining batteries.

For better performance, do check in for an add-on power pack that uses AA NiMH batteries in your digital cameras.

When your AA NiMH batteries stopped accepting a charge, do not throw away them for they are recyclable. Contact your battery manufacturer or local recycling agency to see if these dead batteries can be recycled.

Always make sure to insert similar batteries into your digital camera battery charger. Miss-match set of batteries can result in damaging the batteries or the charger, and in extreme case, a fire too can ensue.

Taking proper care of your digital camera batteries ensures optimum and long lasting performance. Hope the above tips will come handy for the consumers of digital cameras.

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Digital Cameras – How They Work

1st December, 2008
digital cameras
Ted Burns asked:

Digital cameras come in various sizes, shapes, and specifications and offer a variety of impressive features.

Digital cameras are quickly gaining popularity around the globe. Many people already own one and routinely use it for their own pictures. Their use have become part of the culture among many communities and industries.

Digital cameras also have become part of a broad package of combined features with other hand-held tools, such as PDA devices and cellular phones. This makes the use of both devices much more convenient, having them combined in one, rather than two or more, functional instruments.

Digital cameras, moreover, not only can be used for still photos as with conventional cameras, but also for taking videos. An owner needs only to upgrade the camera’s memory card to increase storage capacity.

The marketplace offers a number of digital camera brands that provide a wide range of features. Olympus, Canon, Nikon, Kodak, and HP are some of the better-known brands of cameras offering the conventional 35mm to digital. Other key camera manufacturers include Sony, Panasonic, and Casio.

Digital Camera Considerations

Differing from conventional cameras, digital cameras have a small LCD screen, and sometimes an LCD screen plus viewfinder. The LCD screen is similar to TV screens that allow the photographer to see the picture, even before snapping it. Some have large screens that enable the photographer to see more of the subject and background.

Digital cameras also come with memory slots that hold a memory card or “stick.” The amount of memory available in them ranges from megabytes to gigabytes. Of course, the more memory, the greater the cost. However the extra storage capacity may be well worth the additional expense.

Another purchasing concern is the battery. Some digital cameras use disposable batteries. However, they wear out quickly, so most people recommend rechargeable batteries for longer energy life. Typically a rechargeable battery and a charger come in bundle with the camera unit.

Finally, consider the way the pictures are downloaded. Though many digital cameras come with a USB port which easily connects to a computer, there are others that necessitate removing the memory card and positioning it with a reader to download pictures.

Digital Camera Features

Camera buyers should know at least the basic features of their camera of choice before making an expensive purchase. Though the snapping of pictures is fundamentally the same from camera-to-camera, there are features that make one brand more appealing than others.

For example, the number of mega pixels used when taking pictures – meaning millions of pixels that help with the clarity of the pictures – should be one of the primary considerations to most buyers. Pixels are the individual “dots” that make up the content of pictures.

As such, cameras offering a greater number of pixels can produce larger images with better resolutions than those with less. Be aware, though, that cameras using a more pixels consume more camera memory when storing the images.

The camera’s zoom function is also critical. Most digital cameras are enhanced with a two-zoom capability; the optical and digital. Optical zoom uses a moving lens and makes the subject in the picture appear closer, while digital zoom crops or stretches the image.

Finally, don’t neglect the importance of the camera case’s durability. Some digital cameras are made predominantly of plastic materials – and are consequently more fragile – while others are comprised of a combination of plastic and metal alloy.

Either type has limitations in the amount of jarring that can be sustained without internal damage. Spend a little extra money to purchase a case that will protect your camera investment.

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Benefits of Using a Digital Camera

30th November, 2008
digital cameras
Pooja Lapasia asked:

The power of digital technology has intervened in most works and imaging is one of them. The digital cameras have established a foothold in the market and are slowly but surely wiping away the film camera market. The digital camera has an edge over film cameras in many ways. The quality of the digital photographs differs from camera to camera and one can choose the digital camera that meets their requirement.

The cost and efforts are the major differences in the two forms of cameras. While film cameras cost less, the camera film cost is never ending. Once you have finished your roll of film you need to reload it with another one. The film then has to be developed through a lengthy process and then printed according to your size requirement. Developing the film isn’t an easy task and most of us would prefer doing it from a professional, which adds to the cost. On the other hand, digital cameras have the photos saved on the memory card in the camera. These can be easily transferred to your computer or laptop. They can then be easily printed at your home if you have a printer. The whole process of getting the image in your hand is much simpler and faster.

Digital cameras sport user-friendly features and offer array of options. The most useful function is the instant reviewing of your image. The LCD display at the back of the digital camera lets view your images taken and if you are not satisfied with an image you can reshoot it. You can get the right proportion of the image and not miss out on anything. The size of the LCD displays are increasing for better viewing and some cameras like the Sony digital cameras, Nikon digital cameras etc offer LCD display up to 2.5-inches.

Many digital cameras also offer video shooting ability. Most digital cameras will get you small video clips and higher cameras like the Canon digital cameras will get you extended video shooting. Digital cameras give you the liberty to shoot in several modes like black and white, sepia, tungsten etc, which will enable you to get varied effects in your picture. You can buy digital camera online from popular online shopping based websites. i.e. http://www.naaptol.com/buy-online/WO-shopping-best-deals-W6O/cameras/digital_cameras.html . These sites have different brands featured and you can get the one that suits your needs and fits your budget. You can also avail great deals and offers on your digital camera purchase.

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How to Compare Digital Camera Features

28th November, 2008
digital cameras
Frederic Madore asked:

The day you decide that you need to buy a digital camera you will need to consider various facts. By doing this you will be ready to compare the various digital camera features and decide which digital camera you wish to buy. There are of course many features available when we talk about digital cameras so you will need to isolate what features interest you as a photographer before buying.

So you may start by asking what are the features you want are or need that will help you take great looking photographs. One important factor you might want to consider is the amount of pixel that is offered on the various type of digital cameras.

Of course if you want to compare digital camera features like this you might want to have a buyer’s guide that will list all the various features for each camera model. For example you will be able to compare the amount of pixels for each camera model you consider buying. Always keep in mind that the amount of pixels will usually determine what will be the quality of your pictures. The more pixels you have the greater the quality.

Another factor you should consider when you compare digital camera features is: What will you do with your camera. Is the camera you are looking at is for amateur photographer, semi-serious or serious photographers? Determining this will bring you one step further from buying the camera you need.

When you start to compare digital camera features you will soon be submerge by more info that you were actually looking for. They key is to look for the one you want instead of being overwhelmed by features you don’t need. Some of those feature apart form the pixel amount could be your picture options. Do you want your pictures to turn into sepia, black and white or soft pictures with the use of your filter?

One point I strongly suggest you look into when you compare digital camera features is the shooting modes you get with your camera. You should find indications about various features like the focusing or flash capabilities of various digital cameras. Whether it is Canon, Nikon, Olympus or any other brand of digital camera, make sure you don’t overlook this aspect.

Of course the information you will gather to help you compare digital camera features will mostly be of technical nature. Make sure you look at various sources of information. Another great place to look for information is to buy photography magazines. They will help you compare digital camera features that allow you to take picture with special effects.

These special effects could be special zoom capabilities that allow you to take pictures from a totally new angle or focus capabilities enabling you to crop some of the surrounding areas of you subject.

Of course if you want to take great picture (who doesn’t want to) it helps to have many different helpful features in your camera. It is up to you to find what features you want in your camera by gathering the right information and doing research in magazine, internet articles and digital camera buyer’s guide to help you compare digital camera features.

All those information will help you identify what type of camera you need to best suit your needs. You will need as much sources of information as you can to compare digital camera features. This is surely the best way to make sure you buy the one that you need.

This way you can select the best type of digital camera that is suited for your needs. To compare digital camera features you need all of these different sources. This way you have a wide choice of digital cameras to look at.

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Digital Camera Basics – Want To Stop Being An Idiot And Learn How Digital Cameras Work?

25th November, 2008
digital cameras
Mike Singh asked:

With the advancement of the digital camera and the software that is made for them, most pictures look professional from the first click of the camera. But like most things, it is important to understand the “how and why” for higher quality results.

The basics of a digital camera revolve around terms like pixel, pixel count, white balance, sensor, sensitivity, optical zoom, or digital zoom. These improve your understanding of what digital photography is all about, and will help you become a more efficient photographer.

For example, one important term is digital sensor. A typical digital camera may have a digital sensor element that is as big as a small finger nail. Most 5MP digital cameras use a sensor that is 7mm x 5mm in size. This is much smaller than the size of the negative of a 35 mm camera. However, high-end digital cameras have large sensors, and generate superior images. These are important things to know, to see how pictures can be better or worse.

Digital cameras also have sensitivity settings similar to ISO ratings on film. Most digital cameras will have settings for sensitivity equivalent to ISO 100 and ISO 200. Many also have a setting for ISO 400. A few expensive digital SLR cameras with large sensors have settings for ISO 3200 or even for ISO 6400.

Most digital cameras have an optical and a digital zoom. An optical zoom lens works by changing the focal length and magnification while the zoom is being utilized – with the image quality remaining high. Digital zoom works by cropping the image to a smaller size. The cropped image is enlarged to fill the frame, causing a significant loss of quality.

The manufacturers of digital cameras use the term “pixel count” to describe their camera’s image properties. The word pixel originates from “(PIC)ture (EL)ement”- with the use of phonics added for emphasis. It represents a single point in a graphic image – not a dot but an abstract sample that can be reproduced in any size, without a dot or square appearance.

A pixel is important to understand because it is the basic unit of measurement, used to define a digital photograph. The more the number of pixels per square inch, the higher the resolution of a digital picture, increasing its clarity. Some examples would be 2,400 pixels per inch, 640 pixels per line, or spaced 10 pixels apart. Designers, artists, and photographers sometimes interchange the pixel terminology, such as dots per inch (dpi) with pixels per inch (ppi). The dpi is used when it refers to the printer’s resolution for the printing density. Each pixel is made up of three color channels – red, green and blue-and has a numerical value of between 0 and 255.

The pixel count also decides the size of a print in case you want to print photographs. A 3MP camera can provide excellent 4×6 inch prints, while a 4 or 5MP digital camera can deliver high quality 8×10 inch prints. With a digital camera you can pick the white balance to suit the light source. This is meant to ensure that white looks white, and not yellow or blue. Normally, your digital camera will do this automatically. You can also set the white balance yourself for better effects.

Since each pixel generates three bytes of data, a photographer using a 3MP camera will need a storage space of 9 million bytes or 9MB to store a single image. This is a huge amount of space. Camera companies therefore allow for a compression of image using a format called JPEG. This reduces the file size significantly but while doing so a lot of data is lost. To overcome this problem companies have come up with different storage formats. Canon calls it RAW while Nikon calls it NEF. The data loss is less in these formats.

The low end cameras used by beginners can shoot images whose pixel count is one million is categorized as 1 MP or one million pixel camera because the intensity of each pixel is variable, with each pixel having three or four dimensions of variability – such as red, green and blue, cyan, magenta, yellow, and black. The high-end cameras used by professionals, can range from 14MP to 22MP with a pixel count as high as 14 million or 22 million per image.

The thing to remember is the higher the resolution, the more realistic the image is, matching closest what the actual image is. So take your time, do some research, and talk to people who know cameras. Otherwise, a lot of money will be spent on something that is barely adequate for what you want.

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Digital Cameras: Great Pictures Come With Superb Cameras

23rd November, 2008
digital cameras
Alden Jerry asked:

Digital photography is gaining enormous esteem among the photographers of all levels. In fact, the era of film cameras is over and now the cameras that can generate digital quality images are in fashion. Such cameras have brought a new uprising in the field of skilled photography. These digital photographic equipments are also known as digital cameras. These cameras confine an image in digital format, thus they outsell film cameras. And as the result, the digital photography is gaining tremendous popularity these days.

Digital cameras have become a magnet for the photography lovers these days. There are many benefits which make such cameras helpful for shooting pictures and developing videos. These cameras are just one facet in a long chain starting from the original view through to the concluding image that you display. Actually, the major facet in the chain is an image in a digital arrangement made up of pixels.

There are various benefits, which are associated with these cameras such as:

* They provide the facility of immediate review which allows users to correct their mistakes and take another picture.

* One does not need to spend money in buying film rolls as these cameras give him or her chance to take numerous shots of the same entity or scene.

* These cameras allow users to shoot more than hundreds of pictures in a short span of time and save them on the hard disk of the computer.

* The pictures captured by these gadgets can be copied from one medium to other optical storage medium without any difficulties.

* The users can also upload the pictures on different websites so that they could show them anytime and anyplace.

* These devices are smaller in size and lighter in weight than the film cameras.

* These gadgets enable the users to change the camera configurations so that dissimilar styles of pictures can be tried out.

Users can avail various brand names in the field of digital cameras. Some of them are Panasonic digital cameras, Olympus digital cameras, and Canon cameras. The popular Olympus devices are equipped with the resolution of 15 megapixels and a lot of other advanced features. Similarly, Panasonic cameras are also encumbered with high resolution capabilities, 24X zooming facility, external memory card space and lots more.

Among various brand names included in these sections, Samsung turns out to be one of the best companies in the field of digital photographic equipments. The Samsung digital cameras are one of the best cameras available in the markets. These devices present better image quality, unique interface, manual exposure controls, and smart touchscreen interface and lots more. These cameras hold the resolution counts of 21 megapixels at max. With the optical zoom, built-in large LCD screen, xenon flash, and other features the Samsung digital cameras can produce some very nice looking images and photographs.

There are some online shopping portals from where you can avail the latest digital cameras on discounted rates. These online shops offer discount on such cameras to the customers so that they could get the maximum advantages. Numerous inducements, schemes and deals are also open on these websites. One can participate in these online challenges in order to win free gifts and sometimes also to get the products free of cost.

Once an image is the way you like it, the users can send it to a photo printer or propel it to an online service to print it. The users can also e-mail it to their friends or family members. To get more out of their photos, the users can also send the photograph to a specialty service on the Web for printing onto T-shirts, posters, key rings, etc. and also post the photographs on the World Wide Web.

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Digital Camera Buying Guide

22nd November, 2008
digital cameras
Monty Alexander asked:

Planning to buy a digital camera? Not sure how to get started?

Read on to discover how…..

What do you need the camera for?

If you buy a simple one that can be used at home, you will not get interesting capabilities that you need for taking really good photographic pictures. On the other hand, it would be a waste of your money if you have the latest digital camera only to be used for personal photos at home.

Based on the purpose one can choose from the following main three types.

· Point and shoot: – reasonably compact, with features and size like 35mm cameras.

· Lifestyle: – with moderate features, it’s sleek and compact, so you can carry it around with ease.

· Professional: – with interchangeable lenses, flashes and other accessories, this camera is robust and feature laden, just the right choice for a professional or serious photographer.

These are the important features to look for?

Pixel resolution

Digital images are made up of dots called pixels. The higher the number of pixels in your image, the better will be the quality of the image. This will therefore enable you to enlarge your image to higher pixel dimensions without creating a pixilated (broken) image.

Compression

Compression shrinks a photo’s file size, thus accommodating more images in the memory card. However compression causes a small amount of data loss. If you need the absolute best-quality images, you have to consider buying a camera that takes uncompressed photos but will accommodate less number of images.

Memory

A camera’s memory size will decide the number of images that can be stored. Memory of 128MB will be good enough if you want to use the camera mostly at a social do or a party. If you are on a vacation or when you cannot download images for days at a stretch, a memory of 512MB to 1GB will be most favorable.

LCD screen

Most digital cameras come with at least an optical viewfinder but many digital cameras also come with an LCD screen built into the back. For a digital camera, they vary from 1.5-2.5 inches.

Lens

It is the length of a camera’s lens that determines how much of a scene will fit in a picture. A “Normal” lens is about 50mm, most closely approximate to what your eye sees.

Optical zoom

This enables the photographer to zoom in on an object without any problem in picture quality. Depending on the magnification number, you can zoom in more.

Digital zoom

This feature enables the photographer to zoom in on the centre of the picture by removing the edges of the image.

Focus an exposure

In most cameras, the correct exposure for the lighting conditions is automatically determined. A camera rated ISO 100, has approximately the same light sensitivity as that of a traditional film camera loaded with ISO 100 film. A higher ISO rating means that the camera is more sensitive to light and is potential enough to take pictures in darker settings.

Audio and Movie capture

This feature allows you to record sounds and moving images at the same time, in exactly the same way that a camcorder functions. Some digital cameras provide the facility to record a few seconds of audio with each shot, thus letting you add a personal sound bite to your photos.

Movie mode

This is a feature that lets you take short film clips with your camera. The total record length is typically limited to 10 to 90 seconds.

Flash

Most digital cameras come with an in-built flash. Some cameras however include additional features, such as red-eye reduction or night portrait mode.

Image erase

Most cameras also let you select pictures to erase. This handy feature gives you the chance to edit out the photos you don’t want in order to create space in the memory.

Self-timer

A self-timer allows your digital camera for a delayed exposure, usually giving you about 10 seconds before the picture is taken.

Computer connections

Most high-end cameras have software and connections for both Mac and PC computers. However it is necessary to make sure the digital camera you want is compatible with your platform before you buy it.

Image stabilization

This feature enables the photographer to capture still images of something moving very fast.

Printing

Nowadays you can buy special printers, depending on the compatibility of your camera, to print off your pictures without connecting it to a PC. This applies both for digital and SLR Professional cameras.

How important is size and portability to you?

Size is another very important factor to consider. If you are to use the camera for non professional purposes the size has to be small as you cannot afford to carry huge sized cameras when you are enjoying a trip.

What is your budget?

Based on the budget the features will vary and the overall offering of a camera. Today’s digital cameras run anywhere from Rs 800 to Rs 30,000, depending on resolution and features. While the initial expense of a digital camera is still high you may find that the added convenience and savings in film and processing costs are worth it.

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