Nikon D800 + Sigma 35/1.4 ART inconsistent/front focus

Started 11 months ago | Questions thread
straitouttahell
straitouttahell Contributing Member • Posts: 526
Re: Nikon D800 + Sigma 35/1.4 ART inconsistent/front focus
1

One question: if you point the lens to the ground with the lens cap on, turn the focus manually to infinity and then press AF ON or shutter button, does the lens go to minimum focus distance and then back to infinity smoothly?

I have the same body and same lens, and had a focus inconsistency issue similar to what you have. The lens is now at Sigma service. Turned out it had developed some helicoid problem which involves replacing some parts. In my case, I noticed that, when the lens was pointed down, the focus indicator would not rotate freely, it would stick somewhere halfway between the range extremes.

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Olympus OM-D E-M5 Panasonic Lumix G 20mm F1.7 ASPH Nikon D70 Olympus M.Zuiko Digital 14-42mm 1:3.5-5.6 II +2 more
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