Nikon 7200/Nikor 18-200 Autofocus Hunts
Aug 28, 2017 19:33:39 #
Bill_de wrote:
At this point I would contact Nikon and describe the issue. They should be able to give you a ballpark figure. If you send it in they will give you a detailed estimate for approval before doing any work.
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I tried the online quote thing and got a "have to send in for estimate, unable to calculate one" notice. Might have to just send it in in November when we get the RV back to FL for the winter, the worst I'll have lost is 2x shipping cost and that can't be more than $40 or so.
Aug 28, 2017 19:37:07 #
When I needed my VR repaired, I took it to a local place that was a Nikon authorized repair shop. It cost about $200 and came with a 90-day guarantee.
Aug 28, 2017 19:42:23 #
neillaubenthal wrote:
I'm a bit leery of eBay…did a quick search there a... (show quote)
I have bought cameras on eBay from pixelhub and I would say he is a reputable seller, however, he deals in Grey Market usually, which is probably why he is cheaper on that lens. If there was a descent saving, I personally would not hesitate to buy a lens that was Grey Market, but that is something one has to decide for him/her self.
Aug 28, 2017 21:17:04 #
You've done a lot of testing. It's probably wear and tear from the 40K to 50K photos you've taken with it. I know that sometimes lenses need AF fine tuning after a period of time. That wouldn't cause the autofocus to hunt though. It would just be a little out of focus when it does acquire focus. Photo Tech in New York City does excellent work. You might contact them also.
Sep 3, 2017 16:17:04 #
marki3rd wrote:
If there was a descent saving, I personally would not hesitate to buy a lens that was Grey Market, but that is something one has to decide for him/her self.
The only real drawback…as I see it…is a warranty. If the grey market lenses he sells are warrantable through Nikon then that's certainly worth it for the 180 savings.
Sep 3, 2017 16:29:30 #
CO wrote:
You've done a lot of testing. It's probably wear and tear from the 40K to 50K photos you've taken with it. I know that sometimes lenses need AF fine tuning after a period of time. That wouldn't cause the autofocus to hunt though. It would just be a little out of focus when it does acquire focus. Photo Tech in New York City does excellent work. You might contact them also.
Thanks…I'll do that. I did some more testing today and in manual focus with the 18-200 on both my 7100 and 7000 body the focus indicator works as expected but in auto it still hunts. My Sigma 50-500 at 200 focuses and stops focusing as expected. Looking at photos of a Cooper Mini logo about 200 feet away at 200mm on both lenses…sharpness is equivalent so it isn't that the lens won't focus…it just won't auto focus worth a darn at 200…but it does at shorter lengths and gradually gets worse as I zoom to the high end.
So…since other lenses at the same focal length on both bodies autofocus just fine…I'm about 98% convinced it's the 18-200 just showing it's age. I'll see what a repair costs once we get back to FL for the winter and then make a decision.
Thanks all for your suggestions and help.
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