Best Telephoto lens for NIKON D5100?

Hi, i gonna buy Nikon D5100 for my wild life hobby. Please suggest me great telephoto lens within 20K.

Google it "nikon D5100 lens"

Buy the lens with the most mm you can afford then buy one half its size. That should keep you covered sufficiently.

Http://www.dpreview.com/news/1008/10081913nikon55300mm.asp

Nikon 55-300mm F4.5-5.6 G ED VR lens

Tamron SP 70-300mm f/4-5.6 Di VC USD (not to be confused with the cheaper Tamron 70-300mm lenses) is reputed to be very sharp, and it might fit your budget.

There's sigmas 150-500

That's around $500?

Nikon 55-200mm and 55-300mm would be the best.

Here's a Telephoto Guide - http://www.the-dslr-photographer.com/2011/09/buying-a-telephoto-lens-nikon/