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. Best Smartphone Software

Kit includes:♦ 1) Transcend 4GB Secure Digital SD Memory Card♦ 2) Compact Travel Tripod♦ 3) Deluxe Digital Camera Padded Case♦ 4) NiMH 5-Hour Multi-Voltage Rapid Charger with 2900mAh AA Rechargeable Batteries♦ 5) High Speed USB 2.0 Secure Digital SD Card Reader♦ 6) Cameta Microfiber Cleaning Cloth♦ 7) Precision Design 5-Piece Cleaning Kit♦ 8) ImageRecall Digital Image Recovery Software♦ 9) Memory Card Storage Wallet♦ 10) Universal LCD Screen Protectors♦ 11) Flexible Tabletop Mini TripodThe Transcend 4GB Secure Digital SD Memory Card is fast, secure, and large enough to hold hundreds and hundreds — a whole vacation’s worth — of pictures.The Compact Travel Tripod extends all the way up to 50 inches and folds down to a compact 17 inches. Its extremely light weight plus its included Carrying Case make this the ideal travel tripod for your lightweight digital camera. A tripod is lots of fun because it lets you get in the picture — and (more…)vacuum cleaner reviews

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. character education

This is a 1400mAh high capacity replacement battery. The higher the mAh rating, the more power a battery can store and the longer it will last per charge. It contains premium Japanese grade A battery cells and is guaranteed to outperform the Canon original battery. This battery is CE certified and built to meet or exceed the OEM specification. It is guaranteed to safely power all cameras that use the NB-5L battery. The lithium ion chemistry of this battery makes it 100% memory free. Unlike Nickel-Cadmium (Ni-Cad) batteries, lithium ion batteries don’t have a “memory effect” which shortens their capacity. They can be partially charged and/or discharged without worry of shortened battery life. Are you concerned about protecting the environment? Do you worry about exposing your family to electronics containing hazardous heavy metals (such as lead or mercury)? You can rest easy knowing this battery is manufactured in accordance with the strict RoHS standards, which call fo (more…)

Amazon.com

The Canon CBK4-300 AA battery and charger kit is designed to work with any Canon digital camera that’s powered by AA batteries. This charger kit comes with four AA rechargeable batteries powered by Nickel Metal-Hydride technology that’s free of the frustrating “memory” effect. Although designed by Canon for use in Canon cameras, these batteries will work in any electronic device powered by AA batteries. What’s in the box Canon CBK4-300 AA battery charger, flip-down plug adaptor and four AA rechargeable batteries.

This dedicated battery charger kit includes both a charger unit and four rechargeable AA-size NiMH (nickel metal hydride) batteries. This solution is convenient when taking or playing back large numbers of images.

(more…)

powers select Canon digital cameras and camcorders * rated at 7.4V, 1390mAh * 1-9/16″W x 2-3/16″H x 7/8″D * weight: 2.9 oz. * warranty: 30 days

(more…)

PowerShot A95 Digital Camera (5.0MP, 2592×1944, 3x Opt, 32MB CompactFlash Card) Strengths: High quality 5MP pictures, Camera feels great in hand, swivel LCD screen, best bang for the buck camera. Weaknesses: Included 32MB CF card is too small. Summary: This camera is awesome. I upgraded from a Canon A70 and it was well worth the money. The Canon A95 uses 4 AA bateries, but it eats through normal alkalines way too fast. I highly recommend getting rechargeable NiMH AA batteries and a quick charger.The swivel screen is a major plus, it’s 1.8″ compared to 1.5″ from the Canon A70. The screen is also higher resolution than the A70.I have used the camera for 3 weeks and printed about 50 pics so far. The pics look great and I even cropped to zoom in on some pictures and you couldn’t see any sign of pixelation. I love the manual flexibility with this camera, plus the automatic modes make it easy for anyone to use.The camera has a nice solid feel to it and fits well in the hand. I prefer the Canon A95’s size rather than the ultra compact cameras like Sony’s T1 because you can easily hold the camera in one hand and take pics. But if you have an ultra compact camera, you have to hold it awkward and it my easily fall from your hand.I highly recommend this camera to anyone looking into getting a 5MP camera that’s affordable, flexible, and normal size. further info, visit; http://www.petrousdigitalcameraprices.blogspot.com Cyber-shot DSC-W1 Silver Digital Camera (5.1MP, 2592×1944, 3x Opt, 32MB Memory Stick) Strengths: Size, LCD, AA batteries, movie mode and black & white modes are GREAT – use ‘em all the time. Weaknesses: Flash is weak, zoom inadequate at times. Summary: I spent a LOT of time investigating digital cameras online -one would think I was buying a car or something. Anyway I am a novice camera user and remain very impressed with this little guy. I would certainly recommend it. The movie mode is great for ‘vignettes’ or small movie snapshots. I also use the black and white a lot. I also didn’t think the LCD would matter very much, but it does: I never use the viewfinder. I appreciate the large size of the LCD when passing the camera around to friends to view pictures and movies.Hint #1: Immediately jack up the megapixel resolution to 5 so that you can capture moments in the best resolution possible. Then, bypass Sony’s ridiculous profit margins- for memory cards buy SanDisk instead. The 512 MB is fantastic – you will get a lot of memory space. I saved $75.00 this way – $150 vs. $225. The 32 MB is inadequate for daily usage. I use it as ‘emergency’ memory when my 512 has filled up on me and I need an extra pinch of memory to get me through the moment.Hint #2: Do NOT buy the Sony camera case. They charge a ridiculous price for a shoddy version. Go for a Lowepro – I paid ten dollars and it is very sturdy – also has a nice inside pocket to keep memory cards.Hint #3: Buy a separate set of rechargeable batteries you can swap on the go. The AA battery format is a huge plus.Picture clarity is great for the size and price of the camera. The camera and case are small enough that I WILL take it anywhere, and have. In other words, it is a convenient model.I did find that for indoors the flash was inadequate at a distance. The zoom could also have been 4x or 5x.All in all I am quite happy with this model – but stay away from buying Sony brand ‘peripherals’ unless you like spending money.This camera fulfills my needs. The only reason it does not get five stars for the above drawbacks. Otherwise, a great job by Sony and their third-party peripheral competitors! further info visit; http://www.petrousdigitalcameraprices.blogspot.com FinePix E550 Digital Camera (6.3MP, 4048×3040, 4x Opt, 16MB xD-Picture Card) Strengths: Well priced, 6+mp, all features including raw image Weaknesses: This camera uses 2 AA cells in a hurry Summary: As a professional digital camera lecturer, I must admit that the Fuji E-550 was a very pleasant surprise for me. Priced at about $340, this digital camera produced digital photos that were much sharper, more detailed, and more excellent than I, frankly expected.I found the digital camera very easy to use right out of the box. While this digital camera does have a 12mp interpolated image size available, I found the 6mp native image size to have more contrast, detail and resolution.As you might expect in a consumer digital camera, the digital camera’s flash is not very powerful. At 200 ISO it will produce excellent exposures out to 13 feet. By adding a supplementary slave flash such as the Sony HVL-FSL1B and a bit of flash compensation, I was able to extend the effective flash range out to 25 feet, making the Fuji E-550 useful for indoor photos of large groups.The Fuji E-550 does an equally amazing job with macro or close-up digital photos. It will focus quite close making it very effective for photos of small items and jewelery that might be photographed for sale on auction sites such as www.ebay.com.The strongest suit for the Fuji E-550 is it ability to record a great deal of detail with extreme sharpness and clarity while being handheld. The Fuji E-550 is also very capable of taking excellent night photos when it is placed on a tripod.All in all, I was extremely impressed with the Fuji E-550. I received a lot more digital camera than I expected for the samll price of $340. For those who like to use the raw image format, you will understand that you can essentially re-take the digital photo all over again right in your computer. This is a huge advantage.Of course, being a Fuji digital camera, the Fuji E-550 uses the somewhat more expensive XD electronic data chips. However, the Fuji E-550 is very speedy. From power on to being ready to take the first digital photo takes 1.4 seconds. This digital camera is equally as fast in writing your digital photo to the XD chip.The newer Fuji digital cameras are marketed to compete dollar for dollar with the Kodak line of digital cameras. Therefore, they tend to be very competitive with Kodak and offer in most cases, a lot more features.There is available for the Fuji E-550 an adaptor as well as both a wide angle and a telephoto (1.9X) supplementary lens. The supplementary lenses are very fairly priced and readily available through Fuji’s own website. This is a pleasant contrast to the accessories offered by Sony, through their own website, whose wide angle and telephoto supplementary lenses are unreasonably high in price. Conclusion: The Fuji E-550 is a top quality digital camera. It more capable than most might expect. In addition, it is quite small and pocket sized, extending its appeal to many more digital camera users. It is worthy of your attention. The digital photos produced by this digital camera are amazing and compare most favorably with much more expensive consumer digital cameras. I would happily purchase this camera again.I will be very confident in introducing the Fuji E-550 to the attendees of my workshops all over the world. It is a digital camera that I can point to with a lot of pride, simply because it gives the digital camera user many features and excellent digital photos for a very resonable price. further info please visit; http://www.petrousdigitalcameraprices.blogspot.com for further info, visit: http://petrousdigitalcameraprices.blogspot.com