Jack was pretty right, I did a bit of digging and the older Nikkor PC micro 45mm F2.8 T/S used stop down metering. The new one the Nikkor PC-E 45 F2.8 T/S has electronic aperture control so it can electronically meter exposure wide open then stops down on shooting automatically.
I did actually have one of the old AIs 28mm PC F3.5 lenses. It was pretty good stopped down to F5.6 and I have to say that focal length is a pretty nice place to be. Maybe I shouldn't have sold it.
The interesting part about the T/S lenses I would think is that if the new version has aperture control, how can you effectively look at the depth of field as you tilt seeing the lens is wide open? That must be really hard in live view when there isn't much light and the screen shows a stopped down image.
I did actually have one of the old AIs 28mm PC F3.5 lenses. It was pretty good stopped down to F5.6 and I have to say that focal length is a pretty nice place to be. Maybe I shouldn't have sold it.
The interesting part about the T/S lenses I would think is that if the new version has aperture control, how can you effectively look at the depth of field as you tilt seeing the lens is wide open? That must be really hard in live view when there isn't much light and the screen shows a stopped down image.