Tamron 24-70mm F/2.8 Hands On Review: Also AKA Pentax The Go To Lens - YouTube
Tamron AF 24-70mm f/2.8 SP Di USD VC (Canon EOS) - Full Format Review / Lens Test
Amazon.com : HD PENTAX-D FA 24-70mmF2.8ED SDM WR High-performance standard zoom lens 24mm ultra-wide angle Weather-resistant construction Exceptional imaging power ED Glass Aspherical lens Latest lens coating : Electronics
Pentax HD DFA 24-70/2.8 Real World Review - Alan Bailward Photography
Second Hand - Tamron SP AF 24-70mm f/2.8 DI VC USD - Nikon | Ted's Cameras