http://www.nikonchat.com/nikkor-100-300mm-lens/

Nikon camera lens is better?
Nikkor 55-200mm f/4-5.6G ED IF AF-S DX VR or Tamron 70-300mm f/4-5.6 Di LD Macro Zoom with built in motor? I have a Nikon D50. Virtual reality is for sale for $ 150 and the Tamron is selling for $ 100. I just wanted to know what you prefer. Im looking for durability, high zoom, usually more or less a perfect lens second.
The $ 50 is nothing. Like much, but compare the prices of professional quality lenses, which is $ 2000 +. See? It is worth investing the extra $ 50. find a Tamron lens too soft. Also, the Nikon VR lens – and the Tamron does not. Also AF-S, which is equivalent the Canon's USM, which means focusing faster and quieter. Of course, if you really are so desperate for additional 100mm, then of course we looking for 70-300mm. However, the Nikon lens is a considerable better, even with the DE – dispersion. low extra glass a more expensive alternative is the Nikkor 70-300mm … but it is an excellent goal worth exploring.