Originally posted by bertwert For this lens I'm looking for, WR is a must. And I'm pretty set on the ('boring old') 18-135.
I would not worry to buy used.
I found my two 18-125 so far very reliable. Bought the first one new with my K-5. It has a worn-out bayonet for the hood and attached to the K-5 took an involuntary bath with me in Lake Washington in my backpack, but after drying (a little moisture got inside) it's still reliably focusing and taking so good pictures, that its on permanent loan with my daughter now. I 'replenished' with used one, which now together with a KP, a 15mm LTD, a 55-300PLM and 58mm Achromat for the later (works better for me than the Raynox), two extra batteries and a tiny USB charger (connecting to a solar-recharging power bank) form my kayak tripping set. That set just fits into a B&W Type 2000 case, which is the biggest I can stow when we travel in our two seater sea kayak with camping gear. In calm conditions, the box goes on top for ease of access, but has to fit in between my legs otherwise.
The 10-17mm instead of the 15mm may still fit if I stow the charger and one battery elsewhere. The new HD looks extremely tempting to me. I do have the 8-16mm Sigma, 15mm LTD, and 8mm Samyang FE, as well as a similar kit for the K-1. Still for touring and the almost circular FE option on K-1 ...? My point is that I would consider the 10-17mm an excellent companion to the 18-135mm. I have grown into UWA and FE in the past few years only, now I wouldn't want to miss that option for shots like this
FE one from a hike or
this rectangular one at <=10mm, where I couldn't go back any further. With wind and trees or waves, stitching panos is not always an option.