Weather sealed "pro" lenses

Now I know pentax make the 16-50 f.28, but do they do anything of the same build quality with longer reach, something maybe like a 17-70 or maybe even longer?

Thanks

All the DA* are weather sealed so from small to big.
DA*16-50 F/2.8
DA*50-135 F/2.8
DA*60-250 F/4

Primes
DA*55 F/1.4
DA*200 f/2.8
DA*300 f/4

and they also got the WR version of the kit-lenses so the:
DA 18-55mm F3.5-5.6 WR
DA 50-200mm F4-5.6 WR