Differences in "N" from original were - increased ISO range, greatly improved motor and winder system, improved auto exposure systems and uses the newer PX28 battery. Eyepiece shutter. Shutter speeds from 8s-1/2000 and bulb. * Flash sync is 1/90 X for electronic flash. Shutter type is titanium; electronic from 1/90 - 1/2000. Multiple exposures possible. ISO range 6-6400. Match needle with standard prism - AE Aperture priority with AE head - Shutter priority AE with AE motor drive or AE winder. NOTE: When using "Breech Lock" lenses with the AE Finder, you will not be able to see the f stop the lens is set on from the viewfinder. * Interchangeable focusing screens * Self Timer * Flash sync cord plug, and hot shoe Optional finder heads are .. Eye Level Finder FN (Standard) AE Finder FN Speed Finder FN Waist Level Finder FN-6X Waist Level Finder.