Most of the time my shots are done with my Sigma 30mm F1.4 which has been my primary lens for quite a few years now, however its not weather sealed and so I wont really be able to use it that much next year at an event I'm attending due to all the dust that gets kicked up. So I need another WR lens that covers the 0-50mm range given I already have the 50-200 WR zoom. The primary use case will be taking photos in the evening/night in areas that are going to have a decent amount of dust flying around and I probably wont be using a flash. At the moment the options I can see are the 18-55 F3.5-5.6 for about $250 from a few stores in Aus or the Pentax Australia web store. Another option is the Limited 20-40 F2.8 - F4 zoom from the Pentax Australia web store for $980. Or the DA* SMC 16-50MM F2.8 which is $968 at the moment or the DA SMC 18-135MM F3.5-5.6 for $550 which also seems to be pretty popular. I could also see if any of these are on ebay/pentaxforums/gumtree etc for less. So I have a list of 4 lenses ranging from $250 to $1,000 and I'm struggling to pick which one would give me the best value for money - ie while the Limited's zoom range and aperture is great is it really 4x as good as the 18-55? Or is the 16-50 with F2.8 and all its associated motor issues worth looking at if I'm comparing at that price level? I have enough time to save up and buy any 1 of these lenses but I not sure one which to go with given that I might use any one of them for future events as well. Thought I would ask here if anyone has used any of these or had any input. Edit: from having a further look into this it seems that only the DA* is rated as All Weather and water/dust proof as opposed to the WR rating on the others.