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D3s and 35mm 1.4G...horrible focusing problems!


Salt Lake City, US
479 posts

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Idyfohu Silver Member Nikonian since 24th May 2009
Thu 11-Oct-12 09:01 AM

I'm not sure where to post this, but I recently purchased a well-used D3s and slapped on my trusty Nikon 35mm 1.4G, which has always been spot-on with every other body I've used it on (D700 and D3). However with this recently acquired D3s, the AF is horrible. I just did some testing as I planning on using it for a Wedding on Monday, but the way it looks, being unreliable, it's not going to happen.

At the minimum focusing distance, it needs -20 adjustment (it's back focusing that bad), however, if a subject is a foot away, the back focusing isn't as severe, meaning I would have to change the AF adjustment to roughly -12 or so for the mid range. For subjects further than 10-15' the AF is back focusing by several feet and no AF adjustment can fix it, which I found out today while (fortunately just at a corn maze with my daughter and not during a paid shoot).

To my surprise, the other lenses I tested on it are spot-on with no adjustment needed (14-24mm and 70-200mm VRII).

I'm confused and have no idea what to do. The 35mm is absolutely spot-on, on my other D3 body that is my primary body (The D3s was intended to be its replacement and the D3 would be the backup).

I have no idea what to do at this point so any help would be greatly appreciated.

Thanks in advance.