Amazon.com : Pentax SMC DA* 60-250mm f/4 ED IF SDM Telephoto Zoom Lens w/ Case for Pentax Digital SLR Cameras : Digital Slr Camera Lenses : Electronics
Re: 55-300 PLM vs. older 55-300: Pentax SLR Talk Forum: Digital Photography Review
Real-life size comparisons with K-5 IIs, K-30, DA* 60-250, DA* 50-135 and others : r/pentax