About Lenses

Digital cameras have one of four types of lenses:

• Fixed-focus, fixed-zoom lenses - These are the kinds of lenses on disposable and inexpensive film cameras -- inexpensive and great for snapshots, but fairly limited.
• Optical-zoom lenses with automatic focus - Similar to the lens on a video camcorder, these have "wide" and "telephoto" options and automatic focus. The camera may or may not support manual focus. These actually change the focal length of the lens rather than just magnifying the information that hits the sensor.

• Digital-zoom lenses - With digital zoom, the camera takes pixels from the center of the image sensor and interpolates them to make a full-sized image. Depending on the resolution of the image and the sensor, this approach may create a grainy or fuzzy image. You can manually do the same thing with image processing software -- simply snap a picture, cut out the center and magnify it.
• Replaceable lens systems - These are similar to the replaceable lenses on a 35mm camera. Some digital cameras can use 35mm camera lenses.

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• Optical-zoom lenses with automatic focus Camera
  
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• Digital Zoon Lens
  

Exposure and Focus

Just as with film, a digital camera has to control the amount of light that reaches the sensor. The two components it uses to do this, the aperture and shutter speed, are also present on conventional cameras.

• Aperture: The size of the opening in the camera. The aperture is automatic in most digital cameras, but some allow manual adjustment to give professionals and hobbyists more control over the final image.
• Shutter speed: The amount of time that light can pass through the aperture. Unlike film, the light sensor in a digital camera can be reset electronically, so digital cameras have a digital shutter rather than a mechanical shutter.

Digital Camera Resolution

The amount of detail that the camera can capture is called the resolution, and it is measured in pixels. The more pixels a camera has, the more detail it can capture and the larger pictures can be without becoming blurry or "grainy."

Some typical resolutions include:

• 256x256 - Found on very cheap cameras, this resolution is so low that the picture quality is almost always unacceptable. This is 65,000 total pixels.
• 640x480 - This is the low end on most "real" cameras. This resolution is ideal for e-mailing pictures or posting pictures on a Web site.
• 1216x912 - This is a "megapixel" image size -- 1,109,000 total pixels -- good for printing pictures.
• 1600x1200 - With almost 2 million total pixels, this is "high resolution." You can print a 4x5 inch print taken at this resolution with the same quality that you would get from a photo lab.
• 2240x1680 - Found on 4 megapixel cameras -- the current standard -- this allows even larger printed photos, with good quality for prints up to 16x20 inches.
• 4064x2704 - A top-of-the-line digital camera with 11.1 megapixels takes pictures at this resolution. At this setting, you can create 13.5x9 inch prints with no loss of picture quality.

Photo courtesy Morguefile
The size of an image taken at different resolutions

My Camera!

Manufacturer's Description
witch to the future with the EOS 350D Digital and take your creativity to a new dimension. Compact, lightweight and intuitive; delivering results to captivate the most discerning audience.The EOS 350D Digital employs Canon's acclaimed CMOS technology, for outstanding image quality and 8.0 Megapixel resolution. Always be primed for the next shot with responsive 3 frame per second, 14 frame burst performance and instant 0.2 second start up time. Powerful DIGIC II architecture taken from Canon's pro-series cameras ensures no compromise on sophisticated, effective and super-fast image processing.
Design:
The Canon EOS 350D is the smallest digital SLR available from Canon. The small size can make it difficult to handle for people with b igger hands.

Image Quality:
The opinion upon the image quality is in general very positive. Thanks to the improved image processor you get an image quality that you can usually expect from a semipro model.

Functionalities:
With all functionalities you expect from an SLR camera.

Comments:
The experts were impressed by the speed of this little SLR camera.

Pros:
Small; good functionalities; very good price

Cons:
Small display; instable handling due to the light and small body

Verdict:
The over all impression is that the Canon EOS 350D is a very good product with a lot of functionalities for both ambitious beginners and semi-profs. The reasonable price makes this product a real bargain.