Continuous running of Auto-Focus?
May 31, 2021 10:10:59 #
I have a Nikon D850 and had a Nikon 24-120 Zoom lens on it. All was working well and then all of a sudden the auto-focus just kept running such that it was unusable. I turned off the Auto-focus and that changed nothing. I selected Manual Focus and nothing changed. I put a 70-135 Nikon lens on the D850 and all worked perfectly. I put the 24-120 lens on my D800 and had the same problem with the continuous auto-focus.
Any suggestions to try first before taking it to a repair shop?
Thanks for any recommendations you have,
Any suggestions to try first before taking it to a repair shop?
Thanks for any recommendations you have,
May 31, 2021 10:16:23 #
Common denominator, the lens...
Suspect.
Have you cleaned the contacts on the lens?
Suspect.
Have you cleaned the contacts on the lens?
May 31, 2021 10:17:23 #
May 31, 2021 11:18:36 #
May 31, 2021 13:29:14 #
How about maybe it's the focus point unable to find a subject and running rampantly in the viewfinder? Try locking it and see if you achieve focus.
May 31, 2021 19:49:56 #
Thank you, good suggestion but I tried it and that one did not work either. It's looking more and more like a trip to the shop!
May 31, 2021 19:50:40 #
Jun 1, 2021 06:44:51 #
billnikon
Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
C. Loren wrote:
I have a Nikon D850 and had a Nikon 24-120 Zoom le... (show quote)
1-800-645-6687 could be your friend.
Jun 1, 2021 07:05:24 #
interesting! I have no idea where that phone number will take me, however, people on this website have been very helpful and I will give it a whirl. Thank you for the suggestion.
Jun 1, 2021 07:36:26 #
tcthome
Loc: NJ
Sounds like an electrical problem in the lens. Maybe a switch or circuit board. I would call Nikon for a guesstimate on a repair vs a price on a great shape used one, from Nikon or from a camera store/ebay.
Jun 1, 2021 08:53:09 #
Jun 1, 2021 09:56:27 #
roaddogie wrote:
Try removing the batteries for a reset.
No batteries in the lens.
Jun 1, 2021 10:17:42 #
SuperflyTNT wrote:
No batteries in the lens.
Try and remove and reset the batteries in the camera. Make sure VR is off.
Jun 1, 2021 13:21:19 #
photoman43 wrote:
Try and remove and reset the batteries in the camera. Make sure VR is off.
The camera isn’t the problem.
Jun 1, 2021 14:27:04 #
hjkarten
Loc: San Diego, California
I had a somewhat similar experience using a Tamron 100-400 (Canon mount with the SIgma adapter for Canon-> SONY E mount) on my SONY A6500 and then briefly on my A7R4. I would even turn off the camera, and it would occasionally continue to sound like the focusing motor was running. I brought it to the dealer from whom I bought it, they sent it back to Tamron and Tamron service seem to have fixed the problem. It no longer happens. THey also improved the focus accuracy (which was generally pretty good even before the repair) and cleaned the internal parts, according to the invoice. Tamron has a 6 year warranty. There was no charge other than the cost of shipping it to Tamron. It took about a month before I got it back (that was during the height of the COVID 19 pandemic).
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