Carl Zeiss Otus Apo Distagon 55mm f1.4 ZF.2 T*  type_Lens & Sensor Cleaning even if you only use

even if you only use the macro capabilities every once in a while

Needless to say

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

so it weighs almost 3kg and it's about 72cm long when collapsed

Leitz Or (orange) filter for the 5cm Summitar lens and its weird sunken threads

Carl Zeiss Otus Apo Distagon 55mm f1.4 ZF.2 T* &nbsptype_Lens & Sensor Cleaning even if you only useThe 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.