Originally Posted by Richard Day
I used the FA 28-105 f3.2-4.5 on my MZ-S, it was an excellent lens and also worked exceptionally well on my istD. I found that the K10D began to show up it's shortcomings as the IQ didn't improve greatly from the istD whereas the DA 16-45 improved considerably.
Another fine standard zoom to consider would be the Tamron 28-75 f2.8
I had some focus issues with my istD at the 28 and 105 end, but yes agree the IQ suffers a bit on the K10D.
Dave