testing a NIKON FE that my Wife never uses with an old Optomax Auto-Zoom 85-250mm f4.5 M42 fit lens with the Nikon/M42 screw adaptor . I used full aperture.
I put a x6 Magnifier onto the transparency and couldn't hear a THING -- I think you mean 'REAL FILM GRAIN' !! I set the unsharp mask a bit wrong on the scan I think .