Originally posted by johnha The problem is that 'sensible' wide angle zooms have gone out the window.15-30 is the new 20-35 - manufacturers need it in their line-up, the problems of weight, size and filters as big as dinner plates are afterthoughts.
Once they have a big, heavy, expensive 15-30, a smaller, compact, easier to handle 20-35 would take sales off the 15-30 which had cost a huge amount of R&D resources. It's the price to be paid by having the prestigious 15-30 in the line-up because that's a 'must have' lens to be seen as a credible system.
That does not apply to Pentax - the R&D was done by Tamron. They added the 70-210/4 after the D FA* 70-200 f/2.8 after all.
I wouldn't put a lightweight wide zoom off the table... In
my case (which I know is not
all cases) the 15-30 is out. Never going to be bought. It's far too large and heavy for my uses and I do not need one stop more of light for a landscape lens I'll mostly use at f/8, so I'm glad Pentax didn't spend too much dev time and money in such a lens when a very good one could be sourced much more easily.