As you can see, my focal range starts at 28mm. I sold my 18-135 to fund the 70-300 VR, but with an upcoming trip to Lake Tahoe I think I will be needing something wider than 28mm (maybe?). I figure if I do go wide I should get the Sigma 10-20 or Tokina 12-24. But I'm just not sure how often I will be using that focal range to justify the cost. I bought my D80 in the winter and most of my shots were indoors, so low light capabilities were more important. I never once used the wide end of the kit lens, so I really have no idea how wide I will need to go for landscape shots. I guess I'm wondering if I really need something as wide as 10/12mm or if a lens starting at 17/18mm would be good enough. Opinions?