There are two reasons why lens buying advice needs to be updated:
- There are many new lenses coming out these days, more so than I can remember in the recent past.
- The dedication by manufacturers such as Canon and Nikon to the DX format APS-C image sensor used in most consumer and pro-sumer DSLR's seems to be here to stay. More and more lenses are being built specifically for APS-C and they fill a void left in many manufacturer's full frame lens line-ups for use with APS-C cameras. What does this mean to you? If you want a true wide angle lens for your DX format APS-C DSLR, you're going to need to buy a lens built specifically for APS-C sensors. In my post mentioned above, I said that you should avoid these lenses unless you have a specific reason to buy them, and I still believe that to a degree. But I believe that these days there are more reasons to buy them and the lenses have gotten much better, so I've softened my stance on this a little bit.
From my perspective, my original advice from my original post on this still stands: Most serious photographers will be quite happy with a lens collection that includes a high quality wide zoom (approximately 17-50 mm), a medium range general-purpose zoom that will probably be on your camera most often (approximately 28-135mm), and a long zoom (approximately 70-300mm). After that you can buy specialty lenses for specific purposes if you need them.
Enjoy, and happy shooting (or should I say "happy shopping")!