Is there a 30x aprox.lens for nikon d3100?

I have a s3400 bridge camera with 28x optical zoom, i'm looking to sell it for a nikon d3100
the only thing that i will miss will be the zoom on the s3400 so i wondered whether there was an extremely cheap lens with roughly 25x zoom for a nikon d3100 it does not have to be a very good quality, just cheap and about 25x zoom

Of course not, your 18-55mm and a 55-200mm will do just about anything you could think of.

There are lenses (like Tamron's 18-270mm) that come close, but their performance leaves someyhing to be desired.

What lens do you think you can by a lens for the D3100 with a 25x optical zoom range?

The two longest zooms are the Nikkor AF-S 18-200 and 28-300 mm, both are approximately 11x

Here is a link to all the lenses made by Nikon

http://www.nikonusa.com/...index.page

Trying to use attributes ascribed to P&S cameras to a fully adjustable camera like the D3100 is no really possible

I have two cameras the under your 25x idea that are both 2x lenses. One is a 12-24 mm and the other is 200-400 mm. Both are completely different lenses used for different purposes.

When picking a lens for a D3100, you have to know what each focal length lens "sees"

Here is a link to help you with that.

http://imaging.nikon.com/...simulator/

Do your research and decide what you need and that which lenses fit your budget until you can save more pennies

You can get a 500mm f/8 lens for as low as $100. Quality might not be so good, and it will have to be in bright sun light.

The point of getting a DSLR camera is so that you can pick the lens fit for the purpose. So while there are lenses such as the AF-S Nikkor 18-300mm, these lenses compromise on performance.