[davidmanze]

Get a Sigma 17-50mm f2.8 EX DG OS HSM instead

Actually I did buy a S/H one, in the Pentax K mount, I just couldn't get a decent shot out of it in focus, I spent an afternoon fiddling with AFMA, you would set it to one distance and it would be a foot off at another distance, obviously a dud, it got returned.

  But as the Tammy VC version is considerably softer at larger apertures I see the merit of Sigma's OS which is as sharp with it as the Tammy is without VC.

 

  In my view both the two companies are going to bring out something rather special soon......how long is it since we have we been waiting for a new standard F2.8 zoom?

 

  There just isn't a third party all singing all dancing version at the moment,  I would lean towards a Tamron for focusing accuracy reasons,