kivis is probably talking about the Nikon mount lens. But I agree, the voigts are absolute gems. I have 40mm and will never part with it. It is small, smooth and razor sharp wide open with a beautiful bokeh. It has this amazing quality of snapping into focus so MF is just a pleasure with this lens.
I've been drooling about the 20mm since it came out, but could never justify the cost since I already have an equivalent Nikon. I'm sure it's worth every penny.