內外螺紋均為RMS(0.8"-36)，提供多種尺寸，可用來調整不同物鏡的齊焦高度 型號 L(mm) RMS-M5 5 RMS-M6 6 RMS-M7 7 RMS-M8 8 RMS-M9 9 RMS-M10 10 RMS-M11 11 RMS-M12 12 RMS-M14 14 RMS-M15 15 RMS-M16 16 RMS-M18 18 RMS-M20 20 RMS-M22 22 RMS-M24 24 RMS-M26 26 RMS-M28 28 RMS-M30 30 RMS-M32 32
