Originally posted by windflower Thanks. I have decided to skip the 28-300 and go with an 18-250. Next thing to decide is Tamron or Pentax.
Tamron and Pentax 18-250 are the same lens, but may or may not have the same coatings and may or may not have the same electronic chip. There was some discussion in the other forum about whether a K-7 will apply lens corrections to a non-Pentax-branded lens. Although a K-7 seems to recognize a Tamron 18-250, it is not clear so far whether it will actually correct it. And believe me, there is some correcting to be done at 18mm.
I'm only half kidding about that, but it is a star performer and as far as I've heard is not surpassed by anyone's superzoom.
Unless you can determine for sure that you get the auto-correct feature with a Tamron-branded lens, I'd say go the safe route and stick with Pentax.