I found a useful article by PC Magazine published at ABC News website, dealing with the Digital SLR Camera. LINK

With that article, we’ll learn about the difference between the Digital SLR Camera and the 35mm film SLR camera. We’ll also realize how many pixel do we need for a certain job, just like what has written:

Keep in mind, a 6-megapixel D-SLR will give you more than enough info for a great 8-by-10 print. If you’re interested in fine-art, large-size prints, you might want a 10, 12 or 16 megapixel D-SLR. 

And one of the advices written into it when buying Digital SLR Camera is: … go online or go to a camera store and pick up a spec (technical specifications) sheet on your camera.

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