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09-02-2016, 11:20 PM   #1
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Lense lock

Hi all, been a pentax fan since 1999 when I had my first, I brought a sigma 28-200 I still use it today, but now and then when it's trying to focus it locks out and clicks, . . .
I'm now using k70 and I'm loving it

09-03-2016, 12:14 AM   #2
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QuoteOriginally posted by Chrisd Quote
Hi all, been a pentax fan since 1999 when I had my first, I brought a sigma 28-200 I still use it today, but now and then when it's trying to focus it locks out and clicks, . . .
I'm now using k70 and I'm loving it
Sounds like the beginnings of a broken screwdrive mechanism?

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09-04-2016, 06:19 AM   #3
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Try turning the focus ring with the lens off the camera, in varying attitudes and zoom settings. It may have a loose part in the mechanism.
The Tamron Di II 18-200 can be had for good prices and would be a worthy successor if the Sigma dies.
09-05-2016, 12:02 PM   #4
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Iv been looking at the sigma 18-300 for a all round lens, is this a good choice

09-05-2016, 12:31 PM   #5
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The newest version is not a bad lens at all, especially for a super zoom. It seems to have decent IQ and is sharp. It would be an improvement over your older model. Adorama has a special on it right now.
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