I did a search and looked back 5 pages or so and didn't see a thread on this.
I am looking for opinions on third party lenses. Any preferences of companies? It seems some people swear by Tamron, Sigma, or Others, but there has to be something about the quality compared to the Nikkor lenses as I don't think the Nikon would charge so much for the lenses if they could be made half as cheap. Are there any other thoughts on resale value or durability that keep you away from any 3rd party companies?
I don't have any 3rd party lenses, but I just sold my 18-55 kit lens and am looking toward a faster lens for that similar range. I have been thinking about a Sigma lens...possibly the 17-70, but really anything in that range I am considering.