Anybody Using the CV 12 or 15 SL Fmount Lenses

[mtokue]

Hi, Just started looking at getting a CV 12 or 15 for use on my M's or RD-1.
And I'm leaning towards the 12mm, but when I started to look I came across
these "SL F-Mount" versions of the Ultra wides. I also have some Nikon SLRs
so I figured that these would be great as I would be able to use them on both
systems.
But when I started to look for comments, reviews and or Photos taken with these versions I couldn't find any..... Are there any users here...
I actually prefer the "Look" of the 12mm in this version, remminiscent of the Hologon and the 16mm available for the Contax G..
Any comments?...
Mike.
I found THIS PAGE on Steve Gandy's Cameraquest site but not a lot else.