Originally posted by kref So after reading all you messages I have 1 favorite and it is 15mm
But for me I think there is one more versatile lens and it is 35mm limited HD macro, but it has F/2.8 isnt it to high for inside room fast (child) shoting?
Or is better for me right now buy 15mm + 35 2.4 + tripod and then 100mm macro?
Now, as for the DA15, you probably can't go wrong with that one for landscapes.
When it comes to speed, for shooting children, F2.4 is not that much faster than F2.8. But the DA 35mm Macro Limited doesn't have a focus limiter, so you may occasionally lose time due to the long focus range when it hunts. Yet you can help the lens to auto-focus by prefocusing manually. However, the DA 70mm Limited would give you more distance, while being so unobtrusive that the kids will hardly be aware how big they are in your frame. I bet the 100mm Macro WR is another good portrait option, but again with a long focus range that makes it more prone to hunting.
It is true that fast zooms are more flexible, but they also tend to be expensive, and those with Pentax SDM may actually be slower to focus than the screw-driven Limiteds.
Ultimately, you have to decide about your priorities, given that all the lenses you seem to have on your radar should be competent performers, yet each with its specific characteristics ...