Just ordered a Computar 2.3-6mm f/1.2 CS mount lens.
It's my first CS mount lens, my first Computar lens, also my first zoom lens for DBK/DMK, it will be my wide field work horse. I don't expect very high quality, but just to get a taste of wide field imaging.
Should have well over 100 degree field of view horizontally with my DMK.
Cost $28 USD shipped, fairly nice deal it seems.