hi
i've recently bought a new nikon d5600 with a 18-55mm lens and just a few days ago bought a sigma 18-250mm F3.5-6.3 DC macro OS lens with HSM.
i just can't get the camera to AF using the sigma lens, i've been told it could be the firmware problem but after after updated to the latest firmware still no joy at all, please help. thanks in advice.