The capacity of a card indicates the maximum amount of data that can be stored (less some space for the card's own use).
Megapixel (MP) count refers to the maximum resolution of the camera's sensor -- its ability to record detail. The number of images that can be recorded on a card of a given size is only indirectly related to the capacity of the card, which is measured in Kilobytes (KB) or Megabytes (MB), not MP. That will vary according to the image itself, and to the camera's settings.
For example: My Pentax K10D, with a 10.1 MP sensor and using a 4 GB card, will record approximately 821 images at the highest resolution (10 MP) and a "Fine" resolution setting. The same camera, with the same sensor and same card, will record 10,000-plus images at the lowest resolution (2 MP) and the "Low" resolution setting. Practically all cameras have this ability to change the resolution settings, and thus the sizes of the image files that are stored on the card.
So, you can see that it is only possible to answer your question in very general terms: The higher the capacity of the card, the more images you can store at whatever camera settings. And, as you can see above, even at the highest settings with a high MP count, you can take a lot of pictures!
One thing to think about: storage cards can and do fail. It is better to have two 1 GB cards than one 2 GB card, unless you plan to shoot a whole lot of video. That way if one fails, you can keep shooting and worry about retrieving the images off the other card later.
High quality 4 *6 pictures isn't a problem for a 2 megapixel camera.For a good 8*10 photo you need a 4 megapixel camera.
A 10 megapixel camera won't quite manage a high quality 16 * 20 photo,but they come close.
It means that the photos that the camera will take, will have 2 million pixels in one photo.
Taking a photo with a digital camera
As soon as you take a photo with a digital camera it is on the memory card. You may never see it if you don't view it on the camera or download it to your computer. If you don't erase the memory cardthe photos will remain on it.
A film camera records a photo onto a strip of film, which then needs to be taken to a photo clinic to be processed. The quality is about 25 megapixels. A digital camera records a photo onto a memory card, which can be reviewed on the camera's screen instantly, and you have the option of deleting or saving it. The quality can range from 8-12 megapixels, which is considerably lower than a film camera.
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You can create prints from a digital camera in a variety of ways. You can upload your photos to a PC via a USB connection and then print them on your personal printer or transmit to a third party who specializes in photo development. In addition, you can remove the internal memory card from the digital camera and insert in different media such as a printer or photo kiosk at a local photo development location.
yup, a megapixel is one million pixels. Eg. an eighteen point one megapixel camera can take a photo which is made up of 18100000 single colored dots called pixels.
Walmart does not sale digital camera keychains. The closest they have to digital camera keychains are LCD photo keychains that display your digital photos.
When buying a digital camera you should consider how many megapixels you would be happy with. The higher the number, the better quality of photo it will be. Also, check the size of the memory card and see if it is suitable for your needs. Lastly, make sure the digital camera is compatible with your computer.
by features, and photo quality