<p>Good afternoon,<br> <br />I have had this lens for several years now in Nikon mount, used it on an F100, D200, 5D w/ adapter, and now a D610 with no problems. However, the zoom ring has become rough - you can feel "gears" while turning it, and the focus ring has become loose. Optically, it seems just fine, and autofocus works fine as well. However, zooming is becoming difficult.</p> <p>I contacted Tokina, who responded saying that they no longer work on these lenses as they no longer have the parts. They were quite helpful and cordial.</p> <p>However, I am wondering if anyone has any experience with third-party repair services who will repair older Tokina lenses. I know that KEH has fixed-price repair services, and was wondering if anyone has experience with them, as well as any other repair services.</p> <p>Thanks in advance!</p>