Pentax *ist DS

Announced Sep 13, 2004 •
6 megapixels | 2 screen | APS-C sensor
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Hi everybody (that owns this lens)... I am wondering if my lens needs repair or service. I havent used the FA* 300mm f4.5 lens in a while, but used it on a K-30 last weekend. And it was annoyingly "jittery". I mean the camera would "change its mind" on where to lock focus very often (fractions of seconds). Sometimes it would not settle at all. This was very small increments - not hunting between close and infinity focus lock. It was so bad that I missed quite a few shots. More...
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