Originally posted by str8talk83 Should I add a new lens?
1. The choice for Pentax is more limited, but not impossible. I own the
Sigma 70-200mm f/2.8 EX DG OS HSM which on APS-C becomes a 105-300 mm,
purchased new before Sigma and Pentax stopped producing for Pentax, however it is an excellent zoom, but almost impossible to find with Pentax attack.
2. An alternative at a good price and still traceable is the
Sigma 50-150mm f/2.8 EX DC HSM which equivalent to 70-200 on APS-C excellent optics, I've always heard about it well, buying it used not spendings a fortune and even the weight is modest only 770g.
3.
Sigma 50-150mm f/2.8 EX DC HSM on Pentaxforums
4. Here is a link on
Ebay
You have many proposals, you are spoilt for choice, good luck