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I'd be very interested to hear how you get on with it, it may be on my list once my K10d arrives Does it have the HSM motor? I believe Sigma now do an HSM version for Pentax.

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Not listed on the Sigma website, I believe and this one does not have it. I'm not really bothered as the mechnical focus system on the K10D works fine on ALL my other lenses.

Silent focus is not really too important on this type of lens, not going to use it for wildlife with razor sharp ears!!

I will try it out asap. WHE have Emailed me to say it has been dispatched already, so might be here tomorrow....Wow.

(The WHE price was only £289.99 - £305 to £309 elsewhere)