Originally posted by EricT I highly doubt they will release a DA* 70-200, given the overlap with 50-135, 60-250 and the 200. And even if they did, it would be quite expensive. The idea of WR versions of DA lenses is to give the consumers/prosumers access to weather-sealed glass at a reasonable price.
Also, a DA 12-24mm WR would fit the bill nicely. You don't really need f/2.8 for landscapes.
It's the sealing, more than the f2.8 that i'm interested in. Whether they put it in an updated 12-24, of a rebadged 11-16 doesn't really bother me... Although that said, f2.8 would be handy for a wide-angle walkaround (I know there's the DA 14/f2.8, just pondering).
I think there would still be a market for a 70-200/f2.8. It'd be a big beast (the Sig/Tam versions aren't small) so i don't think it would steal too many sales from the 50-135 (quite compact for an f2.8) as a fast walk-around. And people would still go the 200/f2.8 if they're after outright image quality. But as a versitile sports zoom i think there's a niche in the line-up. I don't really understand where the 60-250 is spose to sit. It's too slow for sports, too heavy for a walk-around, and in Australia it costs as much as the DA* 300/f4... Who do they think is going to buy it?
Even if a DA* 70-200 did steal sales though, I think the issue is that sales are already being stolen, but by third party manufacturers because Pentax doesn't offer anything. At least if there was a DA* version the sales would be going to something in-house.