Nikon Stereo Microscope Objective Lens P Plan 1X  MNH43100. This objective lens is used on the Nikon SMZ800 and Nikon SMZ1000. This item was used as a dealer demonstrator and is in excellent cosmetic and optical condition. One thread has a little ding that can't be seen in the photographs, however it in no ways compromises the ability to attach the microscope or image quality.