Can bad Firmware updates be reversed?

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MichelleDumont New Member • Posts: 4
Can bad Firmware updates be reversed?

I recently did a firmware update on my Nikon D810. The update was the most recent C1.14. I am always a bit apprehensive about installing updates, especially when it involves computers. But there are times when new options are added to updates. But there is always a chance for unexpected issues. I've never noticed an issue with my Nikon DSLR, until this update. A little background: I shoot strictly with Sigma lenses. They are all Auto Focus, and they all work well for me on both my D810 and D7100. Well, until recently. Today I noticed the auto focus on my 50mm 1.4 wasn't responding. Made no sense. It has always auto focused for me. Nice thing about having 2 cameras is the troubleshooting value. The 50mm works just fine on the D7100. So I tried other lenses on the D810 to rule out an issue with the D810. Turns out all my lenses (20mm Art, 24-70mm EX, 85mm Art, 105mm Macro, and 120-300mm) work flawlessly, all but my 50mm and (newly discovered) 10-20mm DX. Both lenses work on the D7100. The reason I am leaning towards the Firmware update as the scoundrel is, it doesn't appear to be a lens or hardware issue. So it must be Nikon's Firmware update. Don't know if Nikon reads these messages, but someone surely needs to investigate this issue and provide a fix. So my question is, unless Nikon can issue a fix, can a firmware update be reversed?

 MichelleDumont's gear list:MichelleDumont's gear list
Sigma 50mm F1.4 EX DG HSM Sigma 85mm F1.4 Art
ANSWER:
Nikon D7100 Nikon D810 Sigma 10-20mm F3.5 EX DC HSM Sigma 50mm F1.4 EX DG HSM
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