Infinity Focus is not quite right

[mehguy]

Are you sure your lens works with this camera?

Well it's an Nikon F mount AI lens on a nikon FE, which is what it officially supports.

 

[wiltw]

I would have to develop a roll of film to find out.

I'm using the split image on the Nikon type K screen.

I'm using a Nikon Series E 50mm 1.8 lens

Have you checked that the screen is properly seated in the frame that holds the focus screen in position, and have you checked to see that the frame itself is properly latched fully upward (toward the pentaprism)?