I have a AF VR_Nikkor 80-400mm 1:4.5-5.6D that I use with my Nikon carmera. I am looking at purchasing a Nikon D3400. Will this lens work on the D3400?
You can use it to take pictures with a D3400, but you will need to manually focus the lens.
Nikon AF lenses do not have focusing motors in the lens and depend on a focusing motor in the camera body. The D3x00 and D5x00 series cameras do not feature an in-body AF motor. AF-S lenses, which do have a focusing motor in the lens, are needed to use autofocus with the D3x00and D5x00 bodies.
There is a newer version, the AF-S Nikkor 80-400mm f/4.5-5.6 G ED VR, that will autofocus with a D3400.