It is important to look at megapixels when buying a digital camera, here is a review of what different megapixels can do for you depending on your needs.
2 megapixels or less
This is typically found on smaller, inexpensive cameras or cameras in combination with other devices (such as mobile phones).
It will be hard to make a high-quality print of any size, but these are just fine for e-mailing photos or posting photos for a personal web site.
I wouldn't recommend it for family portraits or if you really need a nice-looking print.
3 megapixels
This is actually a good compromise between picture quality and low price for most casual photographers.
You can print lovely 4x6 images, decent 5x7s and, depending on the camera, might even knock out a good 6x9 or 8x10.
4 megapixels
You're getting nicer. These images make practically photo-lab quality 4x6s, and great 5x7s and 6x9s.
You can print a nice 8x10.
5 megapixels
Hello, enlargements! This will produce beautiful 8x10s, and even a nice 11x14.
Now you are getting closer to professional photographer levels, and the quality shows it.
6 megapixels and up
Wonderful image quality, but high price tags. You can print large photos, even 11x14 or perhaps more, with satisfying results.
Unless megapixels are the only thing you care about (it shouldn't be), don't get a camera that sounds outrageously inexpensive for its megapixel range.
Yes, I know it would be really cool to get that hot new 6 megapixel camera. If you have unlimited funds, great. But their is an alternative have you ever bought wholesale...didn't think so. You can save hundreds and you can just buy individual items.
Hope this helps.
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