Olympus F and FT were full system 1/2 frames that were well made with a wide range of lens, bellows and microscope adaptors. I have an F. No meter, a little dim, but very light weight, I shot Pan X and Plus X and was able to get a fine 8X10. I have not used my Pen in many many years and no longer have a 1/2 frame negative carrier. I think their are many pen fans and I see bodies and lens on the auction sites.

Good luck,

Paul