I'm happy to let it evolve for a little while. I think the Nikon lens naming one is close enough to be closed, but I don't think we should close "[What is DT series of Sony lenses?](http://photo.stackexchange.com/questions/1790/what-is-dt-series-of-sony-lenses)". I think that is a very specific question about one particular aspect, and answers could have a brief background about what sort of cameras DT lenses would work with and other pros and cons, which aren't so relevant for a broader question.