... I realized that I completely forget mentioning Architecture in my above posts. ...
Architectural Photography often requires a wide angle lens, much like Landscape Photography, andoften, akit lens is sufficient. But with Architectural Photography you need to pay more attention to any geometric distortion
that often comes with wide angle lenses. While geometric distortion can often be corrected duringpost processing, because the process involves playing with the pixels, the result is often a significant loss of detail in the corners. The best solution is to have a very good lens. Again, you can peruse the Architectural Photos
Forum and see what others are using.