I'm getting accustomed to my zoom lens which I use with the Spotmatic. I don't think I have the reflexes at this point to use it to its best effect, but it does allow a level of intimacy with my subjects which would be difficult to achieve otherwise.
I can't recall exactly when or where I got my Yashinon Zoom with the Pentax screw mount. I think I paid about fifteen bucks for it. The 75-230 zoom range gives it quite a lot of versatility. The optics are excellent. The 11-inch length and the weight make it a challenge to hand-hold. It is a lens that definitely requires some practice in using so that you don't focus when you want to zoom and vice versa.