If you're going to share your photos via e-mail, it's a good idea to re-size them before you send them. Digital cameras can create very large image files, and these files can take a long time to download. To reduce the size of your pictures, open them in your photo editing software. Make the files smaller in one of two ways:
- Reduce the resolution, measured in dots per inch (DPI). The minimum resolution for good-quality onscreen viewing is 72 DPI.
- Reduce the image size, measured in inches, centimeters or pixels. A 3 by 5 inch (7.6 by 12.7 centimeter) picture will travel well by e-mail but will still be big enough to see.
Save the result as a new file, and keep your original high-resolution image.
If you'd rather share your photos in an online gallery than via e-mail, you can start an account on an image-sharing site like Flickr, Fotki or Snapfish. Your camera's software may also include automatic uploading options. Many of these services are free, but some limit how many pictures you can upload per month or how much disc space you can use. CNET has a good comparison of online sharing and printing sites.
To test your knowledge, take the digital camera quiz, or see the next page for more information and tutorials on digital photography.
- Camera Quiz
- Digital Camera Quiz
- How Cameras Work
- How Digital Cameras Work
- Digital Photography Basics
- How Photobucket Works
- How Autofocus Cameras Work
- How Photo Sharing Works
- What are the best settings for e-mailing or printing pictures?
- Why do people have red eyes in some flash photographs?
- How does a pinhole camera work?
More Great Links
- Getting the Best out of Low-end Digital Cameras
- Digital vs. Film: One Photographer's Experience
- Digital Photography Tips
- Digital Photography FAQ
- Online Digital Photography Instruction
- Cambridge in Color: Digital Photography Tutorials
- O'Reilly: Top Ten Digital Photography Tips
- Kodak: Taking Pictures
- A Short Course in Using your Digital Camera
- Getting the Best out of Low-end Digital Cameras http://www.tasi.ac.uk/advice/creating/bestuse.html
- A Short Course in Using your Digital Camera http://www.shortcourses.com/using/index.htm
- Digital vs. Film: One Photographer's Experience http://www.nicholsonprints.com/Articles/digital.htm
- Digital Photography Tips http://www.digital-photography-tips.net/digital-photography-blog.html
- Digital Photography FAQ http://www.cs.duke.edu/~parr/photography/faq.html
- Digital Photography Tutor http://www.digital-photography-tips.net/digital-photography-tutor.html
There's a camera that lets you to shift the focus of a photo — after it's taken. Find out about light-field camera technology from HowStuffWorks Now.