Another option is to get a screw mount lens adaptor for your k mount so you can buy some very inexpenisvie lens that perform very well. The adaptor allows for stop down metering (at least on my K1000) but you have very wide range of lens selling for as little as $10.00. Even Takumar (sp?) lens are still very reasonable. I would look for a 35, 105, 135, and 200. I have several very wide (24 and 28) but don't use them very often. Over the years I have used Nikon, Sigma, Leica, and Cannon, but I rate my Pentex Screw Mounts as the sharpest lens (35mm) with excellent contrast that I ever owned. As other camera have come and gone I still have my Pentexs.

Paul