Last week I picked up an original Canon F1 and after getting a battery I decided to check the lightmeter. I set the speed to 100 and metered off a blank wall that was lit by indirect sun. Lens was a Canon 50/1.4 that came with the camera and I got 1/15 at F8. For reference, I also have a New F1, and swapped the lens over and got the same reading. Next I mounted a 50/1.8 on my Nikon F4 and metered the same wall and got 1/15 F5.6. Curious, I put the lens on my Nikon F6 and got 1/15 F5.0. Has anyone else noticed the one to 1.5 stop difference between Nikon and Canon metering? I have not run film through the new camera to see how it responds, but I know the Nikons give good slides.