Originally posted by WorksAsIntended This sounds like a big chunky lense and pretty expensive too.
The SIGMA APS-c 18-250mm is relatively small in comparison to other full frame large SIGMA lenses. Don't be mistaken, the SIGMA is bigger than the 40mm f2.8 pancake lens, but it's roughly on par with the Pentax 18-135mm Telephoto and has more range. For travel the KP and this lens is a reasonable compromise from me having to travel and bang around my more expensive and rare Leica kits.
All I was trying to say is that the range of this lens, from wide to full telephoto is excellent (i.e. APS-c equivalent range of 27-375mm) for its size and weight. It also has a barrel lock button that keeps the lens extensions from coming out in bumpy or extreme conditions.
I bought a mint copy of this lens for about $400, and is my favorite SIGMA APS-c lens.