For a vacation, I was taking the sig 17-70 and 70-200, found it bulky and the family was like I am not waiting for you to change lenses. I went and bought a 18-135 for under $250 from someone's kit, it worked great and I had tons of great photos and I think is the best bargain lenses out there, value of price/iq/(is)/resale, I ended up buying the 18-200 because i wanted to,go,longer, and am very happy with it also, for,around $400. Both these lenses seem to get put down because they are kit lenses. I found I take,so many more photos when traveling with this lens, at home I use the other combo.