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| Angle Measurement Accuracy: | 1inch |
| Optical Parameter: | {"Focal Length":"170 mm","Effective Aperture":"\u03a6 22 mm","Field of View":"3\u00b0 22inch","Focal Length of Telescope\u2019s Eyepiece":"24.3 mm","Maximum Length Between Collimator and Telescope":"120 mm","Slit Width":"0.02 to 2 mm","Diopter Compensation Range":"\u2265 \u00b1 5 diopters"} |
| Divided Circle: | {"Diameter":"\u03a6178 mm","Circle Graduation":"0\u00b0 to 360\u00b0","Division":"0.5\u00b0","Vernier Reading Value":"1inch"} |
| Stage: | {"Diameter":"\u03a670 mm","Rotating Range":"360\u00b0","Range of Vertical Adjustment":"20 mm"} |