Today Leica announced a new robust, limited-edition version of the Summicron-M 28mm f/2 ASPH lens in matte black finish with a special paint that is extremely scratch-resistant:
The interesting part is that the price is $4,495 - $500 cheaper than the regular 28mm Summicron version - here are both lenses side-by-side:
Additional information can be found at LeicaRumors:
Just announced: Leica Summicron-M 28mm f/2 ASPH matte black paint finish limited-edition lens
