How far can SLR lenses zoom at certain mm?

Question: How far can SLR lenses zoom at certain mm!?

Hi,

I am looking for a list that shows how far a lense with a certain mm can zoom!.

Because to me saying I have a 70mm zoom lens doesn't mean anything,

I am looking for something like:

10 mm = _______ m/ft!.
20 mm = _______ m/ft!. and so on!.

Thank you all!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Welcome to photography!.

You can get a camera a lens and go and find out, or do some classes or Try this site:

http://www!.dofmaster!.com/dofjs!.html

or study, or practice and test it all out

After practice, time, study and experience one knows what focal lenghts will deliver what on what body they use for a given shot

Go outside and see what happens when you move the zoom!.!.!.!.!.

aWww@QuestionHome@Com

There isn't an answer!. ALL lenses will show whatever is in front of them!. Some will show it better than others, but there's not a formula!. Here's my stock answer, which I think you will find helpful!.

There is not a lens-to-distance equation!. If we are talking about a "35 mm equivalent," a 50 mm focal length is approximately "normal" view without any magnification!. For most DSLR's, the lens factor of 1!.5-1!.6 means a "normal" focal length would be about 31-33 mm!.

Here is a mini-tutorial I made myself to compare focal lengths!. This is NOT a lens test or a camera test! It is merely intended to show the difference between various focal lengths!. The lens was the Nikon 18-200 VR lens, which is (by definition) an 11X lens, but that 11X does not tell you what the final image will look like!. I added one more frame taken with a 300 mm lens!. The camera was a Nikon D200 so there is a 1!.5X "crop factor," "lens factor," or "focal length multiplier!." There is further explanation on the image itself!. It would help if you click on "All Sizes" above the image!.

http://www!.flickr!.com/photos/7189769@N04!.!.!.

This was done with two different lenses: the Nikon 17-55 and 70-300:

http://www!.flickr!.com/photos/samfeinstei!.!.!.Www@QuestionHome@Com

This may help http://www!.fredparker!.com/vislize!.htmWww@QuestionHome@Com