Originally posted by mk07138 The 16-50 's barrel extends when zooming and it doesn't seem to hurt anything on that lens, so I'm assuming an extending barrel on this one won't hurt its weather sealing either.
true, but it slows me down in telephotos. it's like comparing the zooming feel of the 70-200s and the 50-150/50-135 to the cheaper 70-300 lenses out there. i just don't like the barrel extending for telephotos, the zoom action is much smoother if the lens is IF (internal focusing). i mean, canon was able to make a sealed 70-200/4 lens with IS (i think) and IF in a small, light, affordable package. i'm sure pentax can make a 60-250/4 that's a little bigger, a little bit more expensive, with IF. and maybe i don't like it because it's a DA* and i think of DA*s as the equivalent of canon's L lenses and nikon's gold ring lenses.
anyway, it's just my opinion though