型号 范围 直径 读出精度 灵敏度 抖动 载重
粗调 细调 水平 径向
7R128 360° 15° 25mm 1° 0.5arcmin 1arcmin 1kg 0.1kg
7R174-11 360° 39.6mm 3arcmin 1 arcmin 1arcmin 4kg 1.5kg
7R7 360° 15° 50mm – 1 arcmin 3arcmin 5kg 2kg
7R129 360° 15° 80mm 1arcmin 20arcsec 1arcmin 12kg 5kg
7R172-2 360° 10° 90mm 1arcmin 20arcsec 1arcmin 15kg 7kg
7R150-1 360° 60.6mm 2arcmin 0.4arcmin 0.6arcmin 8kg 1.7kg
7R150-30 360° 60.6mm 2arcmin 0.4arcmin 0.6arcmin 8kg 1.7kg
7R171-200 360° 10° 200mm 0.5arcmin 0.1arcmin 1arcmin 15kg –
7R170-190 360° 10° 190mm 0.5arcmin 0.1arcmin 1arcmin 60kg –