You asked
Is the pentax hd d fa 24 70mm f 2 8 ed sdm wr worth buying used?
Yes, I'd happily buy this one used. Lenses are built to last, and buying a generation or two old is one of the best ways to afford good glass, as buying used explains.
The Pentax HD D FA 24-70mm f/2.8 ED SDM WR is a strong everyday zoom. On the full-frame K-1 or K-1 Mark II it covers 24-70mm as marked. On an APS-C body such as the KP or K-3 Mark III, it frames like 36-105mm, which still works well for general shooting. It isn't stabilised, so it relies on the camera for steadiness.
If you want more reach for less weight, look at the Pentax HD D FA 70-210mm f/4. For wide scenes, the Pentax HD D FA 15-30mm f/2.8 is the one to check.
Written by Claude from this site's pages.