Total beginner here, have been having great fun with my Nikon D3300 during the past year but recently, when using the viewfinder, everything looks perfect but when I look at the image that has been taken, I can see images are coming out black bar a tiny strip of normal image at the very top of the screen.
This only happens using the viewfinder. However, liveview gives a perfect image of the exact same view. It happens with both of my lenses (Nikkor 18-55 and Tamron 70-300) irrespective of what mode I use or whether I'm shooting indoors or outside, so I’m assuming it’s a fault with my settings or body? Any help greatly appreciated!