How much light does your lens let in?

Tamron v. Nikon tests continue with these images of a Foo Dog in very poor lighting.

Wooden Bowls

In the Tamron / Nikon lens tests, we move on to wooden bowls. See the difference the aperture makes in these test shots.

The Contenders

Here are the two lenses under consideration. On the left, the Tamron AF 28-75mm f/2.8. On the right, the Nikon 18-105mm f/3.5-5.6.

Of Nikon and Tamron lenses

Nikon glass v. Tamron glass in this post (with a couple photos). What lens makes the most sense?

How much money do you have?