It all started from Nikon D5300, Nikon D5300 was not accepting sigma lenses but after firmware update it all fixed now, Recently announced Nikon DF also showed same problem and Sigma promised to fix it very soon via a firmware update (Nikon DF – AF Problem with Sigma Lenses).
According Nikon users worldwide Last D3100, D3200, D5100, D5200 and P7700 firmware update killed third party battery compatibility, their third party EN-EL14 batteries no longer work after the last firmware update.
Yes we know that Nikon profit is all time-down and sales are also affected due to smartphone sales + Sony RX series arrival + Nikon D600 oil issue, but this is not the good way to increase the profit.
src-nikonrumor
