I have a Canon AE-1 Program which is my go-to 35mm SLR. On a couple of occasions recently I've needed MLU functionality. Obviously I want to stay with the FD system and keep my lenses. I know that the F-1 first edition has MLU, but do any of the other A-series or T-series have it? I'm also aware that the Pellix has a fixed pellicle mirror but I don't like the idea of losing half a stop, or whatever it is. This camera body will be for astrophotography, and every photon counts!