Has anyone had trouble with a DA 18-135WR Lens?

Started Dec 25, 2013 | Questions thread
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Has anyone had trouble with a DA 18-135WR Lens?
Dec 25, 2013

I purchased one for my SO as a Saturnalia gift, and it's wonky. I get the same glitches when I put it on my K7 or her K5. The focus hunts more than it should, and then once it locks, it won't release or respond to the shutter button (either half or full press), obviously meaning you can't take a photo, which I find to be quite the bore.

About half the time, changing the zoom prompts it to release, but the other half, only switching the camera off will see the lens cooperate further.

Both cameras are on the latest firmware release.

Should I return it, or is there some solution to this?

 mark_ken9820's gear list:mark_ken9820's gear list
Pentax K10D Pentax K-7 Tamron AF 18-200mm F/3.5-6.3 XR Di II LD Aspherical (IF) Macro Sigma 24-70mm F2.8 EX DG Macro Sigma 50-500mm F4.5-6.3 DG OS HSM +2 more
Pentax K-5 Pentax K-7
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