A quick update on the new Oprema Jena Biotar 58mm f/2 lens (currently on Kickstarter) - it will be the "world's only" lens with 17 aperture blades:
"The Biotar 58 is a true Biotar with the unique combination of edge-to-edge sharpness and dreamy bokeh that few, if any lenses, have achieved. But what really sets the Biotar 58mm apart is what you´ll find on the inside - just like the the very first versions of the original Biotar 58, which was produced by Carl Zeiss in Jena, Germany, the modern version will have 17 aperture blades that will help it produce an one-of-a-kind background blur. You won´t find another lens on the market with that many aperture blades."
