How do the zoom lens play a factor in Digital SLR Cameras?

I am thinking about purchasing my first Digital SLR Camera because I am tired of Point and Shoot Cameras, I want something with more detail and potential. Anyways, I was looking into the Nikon D40 because I have heard great things about it being an entry-level Digital SLR. It comes with a 15-55mm Zoom Lens and the D40 for a total of 449.00 online at Amazon.com. I read all the reviews and more than 100 were 5 stars, and the rest got like 4 or something. If anyone could shed some light on how the Zoom lens plays a factor in Image Quality, etc I would appreciate it. For things like sports events, if I zoom into a player, would 55 Zoom be okay, and how about macro images? Thank You!!

YES
the more glass, or plastic between subject and recording medium whether film or electronic the more distortion.

I have worked as a professional since the 1970s, and I have only used zoom lens for low value sports or theatre work, all magazine or studio work were done with fixed telephoto lens.

Sales men tell you what they have is the best available, but it all depends how high you plan on rising, as an artist…

Film is still superior. but for the bottom levels of the market Digital is climbing… in another 40 to 50 years I might have to eat my words.

I own two digital cameras, and four Hasselblads and two 35mm Nikomats

The best digital camera I have used is this one on youtube

http://au.youtube.com/watch?v=x0F2lKW74WE

I am going to buy one just after Christmas,

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