Digital Cameras comes in all size and shapes. In terms of digital camera size we can divide digital camera in following categories

Compact Digital Cameras

Compact cameras are designed to be small and portable and are particularly suitable for casual and “snapshot” use, thus are also called point-and-shoot camera. Compact cameras less then 20mm thick are called as ultra compact digital cameras. Compact cameras are well suited for casual photographers. Most compact cameras does not have advanced features but they are really easy to use.  Most have a built-in flash usually of low power, sufficient for nearby subjects. Live preview is almost always used to frame the photo. They may have limited motion picture capability. Compacts often have macro capability, but if they have zoom capability the range is usually less than for bridge and DSLR cameras. Generally a contrast-detect autofocus system, using the image data from the live preview feed off the main imager, focuses the lens.

Bridge Cameras

They get their name because
they ‘bridge’ the gap between compact cameras and SLR cameras. These cameras come with some advanced features but compacts the use of a fixed lens and a small sensor. Like compacts, most use live preview to frame the image. Autofocus is achieved using the same contrast-detect mechanism, but many bridge cameras feature a manual focus mode for greater control. The high-end models of this type have comparable resolutions to low and mid-range DSLRs. Many of these cameras can store images in lossless RAW format as an option to JPEG compression. The majority have a built-in flash similar to those found in DSLRs.

Digital Single Lens Reflex Cameras

A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that uses a mechanical mirror system and pentaprism to direct light from the lens to an optical viewfinder on the back of the camera. DSLRs are often preferred by professional still photographers because they allow an accurate preview of framing close to the moment of exposure, and because DSLRs allow the user to choose from a variety of interchangeable lenses. Most DSLRs also have a function that allows accurate preview of depth of field.

Many professionals also prefer DSLRs for their larger sensors compared to most compact digitals. DSLRs have sensors which are generally closer in size to the traditional film formats that many current professionals started out using. These large sensors allow for similar depths of field and picture angle to film formats.

The term DSLR generally refers to cameras that resemble 35 mm format cameras, although some medium format cameras are technically DSLRs.

Now with above list of camera we get a fair idea about which type of digital camera is best suited for our requirements. If you want to take pictures of your kid’s first steps and first trip to the zoo, make sure that you have a digital camera that is easy to use, manageable and can take pictures immediately a DSLR cameras is not suited for this situation.

If you buy an SLR to get stunningly sharp photos, remember that you’ll have to carry it – and its flash accessories, lenses, memory cards, and tripod – along with the diaper bag, lunch, stroller, and toys when you go out.

For non professionals a Bridge is well suited if you are looking for some advanced features and at the same your camera should be compact enough to carry from one place to another.

As you begin to research, you may notice that many digital cameras have similar feature sets, but that doesn’t mean they offer equivalent performance. Read reviews (both online and in magazines). Ask friends, family, neighbors and co-workers about their choices.  Before you start researching about any digital camera on internet or in shops Ask Five Questions Before Buying Digital Camera. It is not possible to to include all key considerations in one article,So today’s post is about how many megapixel you need?

What is a Megapixel ? 

A megapixel (MP) is 1 million pixels, and is a term used not only for the number of pixels in an image, but also to express the number of image sensor elements of digital cameras or the number of display elements of digital displays. For example, a camera with an array of 2048×1536 sensor elements is commonly said to have "3.1 megapixels" (2048 × 1536 = 3,145,728). The neologism sensel is sometimes used to describe the elements of a digital camera’s sensor, since these are picture-detecting rather than picture-producing elements. 

Printing and sharing photographs is lot easier with Digital cameras as compare to film cameras.  Megapixels are important factor while choosing any digital camera but only more megapixels lead to better pictures. This is not the case.

Megapixels vs. Image Resolution

Any digital camera having 1.3 to 6.1 megapixels, bigger is considered as good digital camera. For high quality images megapixels matter up to an extend. Resolution is a measure of image sharpness based on the number of pixels that make up the image. More pixels produce sharper, more detailed images. 

if you only need photos for a Web site,sharing on social networking, sending email  or smaller prints (such as 3×5 or 4×6), you find great results and lower prices in the 1 to 2 megapixel class.

If you think that you may want to enlarge some of your images to 8×10 inches, consider a three-megapixel digital camera. Cameras in this category provide excellent-quality images. 

Digital cameras with resolution higher then 5 or 6 are capable of producing professional quality images. Generally these type of digital cameras are designed for serious or professional photographers. Generally are not appropriate for beginning photographers.

Megapixel and Image Quality Relation
Camera Resoluation	Email ,Sharing and Web Sites	4" x 6" Prints	8" x 10" Prints	11" x 14 Prints
Under 2 Megapixels
2- 3 Megapixels
3-4 Megapixles
5-6 Megapixles
Over 6 Megapixles

How Many Megapixels Do I Need?

Making a decision to purchase a digital camera is very but choosing right digital camera that meets your requirements and fit in your budget is a different story. Digital cameras comes in different different sizes,brands,colors and features. Manufactures place so many features in digital cameras. There are lots of different cameras with more features and options than you can imagine. How do you find the camera that’s right for you? The search starts by answering these questions:

What do you want your camera to do?

Write down things that you want to do with your digital camera, after this prioritize things that you want to do with your digital camera. it’s fun to have the biggest, best, feature-packed megapixel  big digital camera available, but how often will you use all of its features? Most digital camera comes with a huge number of features than would you would ever use.

Who Will Use the Camera?

Second question ask your self is who is going to use digital camera. Will a spouse also be using this camera? Or your teenager? or your parents also?. If more than one persons are going to use digital camera than you should also look durability, ease of use and battery life.

What do you want to do with the photos?

Do you want to use digital camera as your film camera means do you want to print your photographs, or you want to share your photographs over internet or storing all your photographs on computer or printing and framing some of the photographs.  Answering these questions helps you determine how many megapixels you actually need, where you should start looking and what price range to expect.

Do you want to take videos?

If you are looking to shoot videos than digital camera is not good idea for this. If you still want to shoot videos from your digital camera then in this you look for a digital camera that can support large memory cards.

Look at the specifications for the cameras you’re considering for the details on the quality of the video you’ll get. It should tell you the physical size of the video (640×480 should show well on a television screen) and the number of frames per second (30 fps is considered “television quality”).If you want to edit that video, compare the format in which the camera will store the file with the files that can be used by your editing software.

Where do you plan to take most of your pictures?

Most digital cameras can take staged pictures in good light. If your objects are in low light or moving than you will need to look features like fast recycling and high speed lenses. For low light situations  a digital camera with special circuitry to give it greater sensitivity to light would be a good choice. 

Image stabilization (IS) is a family of techniques used to increase the stability of an image. Image stabilization would help you to take clear sharp pictures even if the photographer is not completely steady. However, image stabilization does not prevent motion blur caused by the movement of the subject or by extreme movements of the camera.

How to Create SmartArt Diagrams in Microsoft Office PowerPoint 2007 ?

Microsoft SmartArt graphics make it easy for you to create high-impact, professional diagrams. Instead of spending hours designing your own diagrams, you can use Microsoft Office PowerPo int 2007 to focus on the visual message that you want to communicate.

1. On the Insert tab, click the SmartArt button.
2. In the list of diagram categories, select the type of diagram that you want to add to your presentation.
3. Under Type your text here, type a list of the information that you want reflected in your diagram.
4. Click the Design tab, and then select colors and styles from the available galleries to make your diagram look great.

How to Insert and Format Charts in Microsoft Office Excel 2007 ?

Microsoft Office Excel 2007 comes with many new professional looking charts, helps you to analyze and visualize your data. To insert a chart:

1. On the worksheet, arrange the data that you want to use in a chart.
2. Select the cells that contain the data that you want to use for the chart.
3. On the Insert tab, in the Charts group, click the chart type, and then click a chart subtype that you want to use.
   

To see all available chart types, click a chart type, and then click All Chart Types. Excel will select the default formatting layout, but you can quickly modify it:

1. On the contextual Design tab, select a chart layout from the gallery to display the legend, axis, and title the way you want.
2. Select a chart style to modify color and effects.

How to Add RSS Feeds in Microsoft Office Outlook 2007?

Really Simple Syndication (RSS) feeds are an easy way to subscribe to interesting information like world news, sport scores, or blogs. It’s really easy to add and read RSS feeds in Microsoft Office Outlook 2007.

1. Click the mail folder called RSS Feeds.
2. Choose a feed that interests you from the RSS Feeds content directory.
3. Outlook prompts you to add this feed to your list. Click OK.
4. Outlook creates a specific RSS subscription folder for this feed below the main RSS Feeds folder.

With Internet Explorer 7 and Internet Explorer 8, you can synchronize your between Internet Explorer and Microsoft Office outlook 2007.

How to

How to Print Page Backgrounds with Microsoft Office Word 2007?

By default, page backgrounds created with the Page Color option in the Page Background section on the Page Layout tab in Microsoft Office Word 2007 do not print. However, you can print them with the document if needed.
To include the page background when printing, click the Office button and then click Word Options. On the Display tab of the Word Options dialog box, select the printing option Print background colors and images, and then click OK.

Web Application Gallery makes life really easy for computer users to browser and install most popular ASP.net and PHP web applications on their local computer system. Users can browse and explore applications like online photo galleries, blog applications and content management applications built on ASP.net or PHP. The Web Application Gallery integrates with the Web Platform Installer 2.0, so that when a user clicks “Install” for an application, the Web Platform Installer 2.0 launches with context set on the user’s selection. This powerful combination of application discovery and simplified installation makes it easier than ever for community-based applications to run on Windows.

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Skype 2.8 for Mac will be available on Tuesday. It has some new features including screen sharing & an integrated Wi-Fi hot spot connector, ability to add your own notes to contacts, Sort and set priorities to chats in the Drawer. This new version will have excellent screen-sharing capabilities to the app’s voice, video, and chat communications features. Skype2.8 for mac means users will be able to run all four channels at once with acceptable performance.

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Unlock iPhone

Now You can Unlock your iPhone 3G in easy 5 steps. The DevTeam has developed and released yellowsn0w, its the world’s first tool to unlock iPhone 3G . To use this you need to upgrade the latest baseband 02.28. It can also support the older baseband on firmware 02.27.but you have to upgrade to firmware 2.2 with the 02.28 baseband. You can either download QuickPWN and jailbreak your iPhone 3G to firmware 2.2 or download PwnageTool.  Download here

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Google has made a lot of  improvement with Google Apps this year. Google Inc. has added a new feature that will enable users to find and access their Google documents direct from their desktop. The gadget has associated with a tool for drag-and-drop uploading documents to convert them to Google Docs.  Now this gadget is available to work with Windows and Linux versions of Google Desktop Gadgets, as well as Google Apps work accounts.

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In Sanfrancisco, Adobe system has announced that – AIR (Adobe Integrated Runtime) technology will be associated with the Linux Desktop. Currently AIR technology is available for Windows and Macintosh, but users will be able to get this AIR technology to Linux desktops from Thursday. AIR (Adobe Integrated Runtime) technology is available free for users. Even you can Download the free Adobe AIR SDK & AIR development tools also.

The Adobe AIR runtime lets developers use web technologies to build rich Internet applications that run outside the browser on multiple operating systems.Now Users will be able to build AIR applications by using Web development technologies such as JavaScript, HTML, ActionScript and Adobe Flex. The same AIR installer runs on all three platform Linux, Windows, and Macintosh.

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