Originally posted by eccs19 The Tamron lens scares me. I personally have not had any luck with any Tamron lens. I hope Pentax has forced them to up their quality. I can't see myself getting one.
I think you need to look at what people are saying about the 24-70. I've not read anything bad about it at all. And I've had the 17-50 (multiple copies), the 70-200 and the 90 2.8. The excellent copies of the 17-50 were the best in its range (I have a solid 16-50 DA* now). The Tamron 70-200 is simply great, and worth the money that it costs. The 90 2.8 macro is an incredible lens also. I'm sorry you haven't had great luck with Tamron, but I sure love my 70-200, and the 90 2.8 was stellar. I am considering going back to the Tamron 17-50 over the 16-50 because of weight.
My 2 cents. But I've read nothing but stellar reviews of the 15-30 and the 24-70. Tamron has upped its game since they designed the PK 17-50, for sure.