OK, should be this guy on the left. I always get mixed up with this series
Those are both in the series. The focus ring overlapping the DOF markings is diagnostic. Check the links on Roland's site.
I've had an unconverted K version for a while, unused and forgotten. I just bought an AI copy and rediscovered the K copy. Now that my three-week long cold (which wreaked havoc with all my plans) is finally but slowly dissipating, I hope to get out this weekend and try it out.
Edit: The one on the left is the K version and the one on the right is early AI; both are the 6-element version which is what I was trying to say.