Conner999 Offline Upload & Sell: On
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Have had the same thing happen with an 85/1,4G on both a D3S and D800e. Will miss focus, on a perfect focus target consistently (back focus by random amounts). No amount of anything setting / AF adjustments l contact cleaning, etc., will fix it. First time it happened, it drove me nuts on a shoot until I switched to a backup lens.
Came from out of the blue after years of perfect performance. No damage, etc., nothing. Other lenses fine AND if you manual focus the lens by eye or using the dot indicator it's bang-on every time.
It's as if the AF motor or firmware in the lens is 'out of sync' (for lack of a better term) with instructions from the camera.
I have another great lenses in that FL, so I just use it in manual focus mode (which I prefer anyway) as can't be bothered going through a back / forth / "we can't replicate the issue", etc., repair process to repair the AF - at least yet.
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