Carl Zeiss Otus Apo Distagon 55mm f1.4 ZF.2 T*  type_Lens & Sensor Cleaning This one has a 4-stop

This one has a 4-stop maximum density at its centre point

with some notable paint wear and brassing on the rear door and baseplate

Great for macrophotography

and no fungus or haze BUT- and it's a big but- there is a little pinprick-sized pit right in the dead centre of the front element

Note the small scratch in the front of the barrel

Carl Zeiss Otus Apo Distagon 55mm f1.4 ZF.2 T* &nbsptype_Lens & Sensor Cleaning This one has a 4-stopThe Carl Zeiss Otus Apo Distagon 55mm f1. 4 ZF. 2 T* is a no compromises "normal" lens for Nikon F mount. Well, there's one compromise: it's huge, and it weighs more than a kilo. Also, it's manual focus. Other than those two compromises, though, no compromises! This is a beautiful, sharp lens for folks who are looking for the best possible performance at any aperture. Smooth focusing, clean glass. Includes hood.