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08-27-2020, 08:46 AM   #1
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D FA 28-105 Auto focus issues

About my lens. The auto focus has been working fine in both optical, and live view. The other day it quit focusing past 70mm. It searches but never resolves. I put it in live view auto multi AF points, and it works, but only that setting. Note: It does the same thing on both my K-1 mkII and my K-3. None of my other lenses do this. Can someone help me on this issue... I really don't want to spend $200 to find out?


Last edited by hitek39; 08-27-2020 at 10:29 AM.
08-27-2020, 10:03 AM   #2
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Does it work manually?
08-27-2020, 10:15 AM   #3
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QuoteOriginally posted by ProfessorBuzz Quote
Does it work manually?
Yes, it focuses over the entire zoom range focusing manually!
08-27-2020, 11:46 AM   #4
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Try cleaning the contacts. It may help.

08-27-2020, 11:51 AM   #5
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Do you feel more resistance in some circumstances when focusing manually? When it does work in multi-zone live view, is it fast or does it struggle?

I'd clean the contacts also.
08-27-2020, 06:23 PM   #6
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QuoteOriginally posted by bdery Quote
Do you feel more resistance in some circumstances when focusing manually? When it does work in multi-zone live view, is it fast or does it struggle?

I'd clean the contacts also.
Thank you. I did clean the contacts, no change. Also, the focus ring turns like it did new. In live view it searches, but I've always experienced slower focusing in live view. Oh well... again Thanks for the response!
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