The lens is very small, lets in a ton of light and is sharp wide open. I love how it draws the out-of-focus areas of the image.
This lens fits on any M-Mount camera as well as all the popular mirror less cameras with an adapter. It comes with the caps as well as the OEM hood (not a cheap accessory, that's for sure. Has a small dent in the hood that was there when I bought it second hand. Does not affect image or usage) $550 USD. I am also selling a Zeiss Ikon (the one you see in the photos). If you buy the lens and the camera, I'll take $50 off.
I should mention that I am in the market for a Phase One P25+ Mamiya mount, so if you have one to sell or trade+cash, let me know!