In article , cz585@FreeNet.Carleton.CA says...
>I need a clear viewing screen for a Nikon F.
>A center bullseye is OK, but split/screen or ground glass is NG. (..)

You can trade F3-4 frames with F-F2 frames (the "glass" is the same size), so if the screen you want is currently made, you can fit it
to your F.
Hope This Helps