I recently bought a Nikon D800 and a AF-S Nikkor 24-120mm 1:4 G ED lens and once it starts getting darker my view through the view finder reduces to an impossible level to see anything. in live view I can see nothing is it something i have set or not set?
Welcome to the forum. In brighter light, how do the pictures look? Overexposed or underexposed? If you snap a shot when you can't see because of darkness, how do they look? My first thought is that the aperture is stuck closed on the lens.