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    1. Jiaxing Rui Xing Optical Instrument Co., Ltd 簡體中文版   English
      You are here: Home >>  產品中心 >>  停產系列 >>  AL系列 >>  View Details
      Caliber: 130mm
      Focal length: 860mm (f/6.6)
      Objective type: three chip fully separated composite achromatic
      Net weight: 7.8kg (excluding hoop, hatch plate and handle).
      Resolution: 0.88 sec
      Visual limit magnitude: 13.1
      Outer diameter of lens barrel: 144MM
      Main lens tube length: 675mm (see list below for details)
      The length of the lens tube is (Extended): add two short cylinders, "945mm/ plus a short cylinder", 885mm/ does not add short ends and "825mm".
      Total length of lens tube (shrink): add two short cylinders "795mm/ plus a short cylinder: 735mm/ without end and short cylinder: 675mm"