This is a head to head (somewhat) of the Tamron 70-300 f/4-5.6 vs. Nikon 300mm AF f/4. Now most people know or have heard prime lenses are sharper then a normal zoom lens. Well lets see how a newer Tamron lens does agains a older Nikon lens that was built back in the 80's. Here are sample images for everyone to look at since YouTube does not always work for people at the higher settings.

Tamron Lens on Amazon:
Nikon Lens: (you have to look for the f/4 version since eBay lists many different kinds)