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09-29-2011, 07:49 AM   #1
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DA Prime focus smoothness

Hey Pentaxforumers,

I acquired a DA21 a few months ago, as I started to go the route of the primes. So, in the DA line, I have a DA70, and also a DA21. I noticed that my DA70's focus ring is super smooth, and I really enjoy it. However, my DA21's focus ring doesn't give the same feel and smoothness of the DA70. In fact, it feels like there's grease missing.

I'm just curious if anyone else has this feeling with the DA21. How does the focus ring compare to the DA70? If this isn't normal, then I might consider bringing it up w/ Pentax Warranty.

09-29-2011, 08:08 AM   #2
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My DA 21mm isn't like that at all. In fact it's just like the DA 70mm. Yes, I would get it repaired/checked out under warranty.
09-29-2011, 12:34 PM   #3
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I have the DA 15mm and the 21mm and there is a definite difference in smoothness. The 15 is almost buttery, but the 21 has a somewhat coarser feel to it. If I put my ear to it while rotating the focuser, I can hear a light rasping noise.
09-29-2011, 01:00 PM   #4
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I would send it back for repair/exchange, i don't think it should work like this. Movement should be smooth, you are not supposed to identify friction sound or to feel in use. You can leave it like this though, and i bet will work until warranty expires. Maybe some time after, who knows?

09-29-2011, 08:42 PM   #5
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Thanks for the help guys! Time to head out to Shinjuku and visit the Pentax Forum then =]
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