Zoom knob has its plastic cover slightly cracked on one side, this doesn't affect operation. Pic 8 beetween 1.2 and 1.6 Pic 7, diameter is 45mm. The item "RARE CARL ZEISS GREENOUGH ZOOM 4.0-1.0 MICROSCOPE 10X LENSES VINTAGE STEREO BINO" is in sale since Friday, May 18, 2018.This item is in the category "Cameras & Photography\Telescopes & Binoculars\Binoculars & Monoculars". The seller is "robozlak" and is located in Nickelsdorf. This item can be shipped worldwide.