[Mr Bump]

Thanks for the link H and Geoff. An interesting first review of the 18-135 but I will wait for more.

I too have considered the Sigma 18-125 which is a very good lens in many ways but I gravitate towards the Pentax lens for a few reasons - and inevitably its high launch price will drop in time.

Like Sue Allen I have concerns about the reliability of Pentax's SDM motor and their 12-month guarantee. The new 18-135 marks a move by Pentax to the proven AF motor type used extensively by their competitors, which is no bad thing. The fact that we can probably look forward to lenses of DA* quality with the improved AF system makes me feel a lot better about going with Pentax. I just hope that Hoya gives them all the backing they need.

I wonder, also, whether Pentax will be able to shoehorn the new AF drive into the superb Limited lenses, which they were unable to do with the SDM motor.