Originally posted by Unsinkable II The indicated price is only US$50 off a Tamron 17-50 2.8 (non VC).
Where are you finding the Tamron 17-50/2.8 for $270? I think you're off by over $100.
And in any case, the 35 is barely a quarter the weight of the zoom, barely half the length, takes a 49mm filter instead of 67mm.
Between the difference in price and the difference in size & weight, the prime will be a much more attractive option to many - being slightly faster is just a bonus. Those who tend to prefer large, heavy, and relatively expensive zooms were not the target market for this lens.
BTW, regarding the DA35/2 WR idea - even if Pentax didn't have this up their sleeve already, that's not to say it might not occur to them eventually. Assuming of course it really is as viable as suggested. Even if based on the FA35/2, I could imagine that the amount of glass they cut out to "optimize" the lens for APS-C might preclude f/2. But they of course could always go back to the original design.