ilnonno
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 p.1 #9 · D3s and 35mm 1.4G...horrible focusing problems! | |
Hi,
own the same combo (D3s and 35 1.4G), and had trouble focusing the 35 too, although not as serious.
In my case, it depended on a bent camera mount (my D3s had a rather bad fall, *with* the 35 mounted. Lens came out unscathed, but the body cracked, and, we discovered later, the body mount bent).
After changing the mount, things improved.
Beware though: the D3s too never failed the "2.8 zooms test". Unless you really have a serious problem, F2.8 is a generous aperture for current autofocus systems, which helps to hide small misalignments.
In any case, though... expecting the G trio to focus reliably is "unfair" and, in my experience, somewhat delusionary...
I never can & could reliably trust the "G trio" to nail the focus all the time. No one of my bodies offers results that rid me of that post-shot "Has it really got it?" anxiety: the 2 D700s I had were good, but not perfect. Same goes for the D3s (slightly better), and the D4 (even a tad better than the D3s). But focusing at 1.4 can (and will) often go *really* bad, on any of my bodies. Especially the 24, which is really difficult to tell from looking at the viewfinder whether it's correctly focused or not.
It is just that f1.4 is a really tough aperture for the AF system.
Good luck, and enjoy your D3s: it's an amazing camera, and a tough opponent for the D4! 
Lory
idyfohu wrote:
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....Show more →
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