Up for sale is a brand new condition silver Zeiss ZM 50mm 1.5 C Sonnar in M mount. I purchased this and the silver filter brand new from B&H a little over 6 months ago. It's focus is optimized F2.8 and it very smooth as is the aperture. As far as condition, this is without question in new condition in every way, no dust, no marks, nothing but a brand new lens in the box with all supplied items. The only reason I am selling it is that I found a great deal on a super clean Summilux 50mm 1.4. $900 plus 1.5% for Paypal gets you the lens delivered via Fedex in the lower 48.