Filter use possible on DA 10-17?

<p>I just received a beautiful copy of this lens from KEH, without papers, and was somewhat surprised to see what appears to be filter threads on the front sunshade/filter ring area. Is it possible to use a filter on this lens? <br>

I searched PN and looked at the Pentax and Adorama websites but could not find a definitive answer. The closest I came was the Adorama website, where it indicates "n/a" in the filter size specification. </p>

<p>Bob-I believe that the threads are meant for a lens shade and not for filters (due to the curvature of the front element). cb</p>

<p>Thanks, Charles. That would make more sense. </p>

<p>The lens shade is built in. I think the "threads" that you see are just for aesthetics.</p>

<p>I own the Pentax 17-28mm which is the grandfather of the 10-17. It also has, according to specs, "no filter threads." But nonetheless I was able to screw a 49mm UV lens in just for protection. It comes perilously close to the lens's front element but does clear it. Downside is it's not a perfect seal in that the built-in lens hood is scalloped so there are small gaps all around. But, it does offer 90% protection which is pretty good.</p>