8.What is Resolution?

The more pixels a camera has at its disposal, the greater its ability to reproduce even the finest details and structures - much like a mosaic with a large number of small tiles as opposed to a much coarser mosaic with only a few, large tiles.
eg: pic opposite taken at 3 million pixels has enough data to make small details visable.
Nonetheless, you don't have to have maximum resolution all the time.

• The resolution (= number of pixels in a digital photo) says less about the quality of the image than about the size in which it can be printed on paper.
• The higher the resolution, the larger the image file - and the smaller the number of image files that will fit on a memory card.
• Even if you have a high-resolution digital camera, you don't always have to take your photos at "full capacity". Almost every camera lets you vary the resolution setting from one shot to the next and thus take photographs with a lower resolution even with a 5-megapixel camera.
• 2 megapixels is usually perfectly adequate for presentation on a web site, e-mailing or producing a paper print up to the standard format of 10 x 15 cm (4"x6").
  The resolution can certainly be a little higher for larger print formats or selective enlargements: 3, 4 or 5 megapixels will stand you in good stead in this case, depending on your individual requirements.
• You don't always need the highest possible resolution. Files with 1600 x 1200 pixels - or even 1280 x 1024 pixels are sufficient for printing digital vacation photos in a standard size, such as 10 x 15 cm (4"x6")The lower levels, down to the so-called quarter-VGA size with 320 x 240 pixels, are, however, only suitable for e-mails or for illustrating a website.BACK