Anyone know where I can get more info on this lens? Specifically, I need instructions.

I picked this lens up at a flea market of all places. The guy selling it had in a Hassey 500CM and it gives this soft-like appearance using these disks with holes. The guy selling it had no clue how to use the lens or the camera. It was obvious since he had it on sale as a package for $650 CAD. I had to show him how to wind the camera and what to do after it reached 12. All I wanted was the lens, which I bartered him down, for the lens only. I figured it was worth a lot more.

Any help would be appreciated.

Regards, Art.