An objective focus arming lens

The utility model relates to an object lens focusing sighting telescope, which is provided with a telescope tube (1), an optical spotting system composed of a set of lens installed in the telescope tube, an object lens frame (2) arranged in the telescope tube, and the object lens frame is connected with a distance adjusting wheel (3) through multi-thread. The utility model is characterized in that a guiding groove (12) is arranged on the object lens frame, the telescope tube is connected to the guiding groove through a guiding bolt (4) installed on the telescope tube, an annular sliding block groove (13) is also arranged on the telescope tube, a sliding block is arranged in the sliding block groove, and the distance adjusting wheel and the sliding block are connected through bolts. The layout is compact, therefore, the reliability and the spotting precision are enhanced; the distance adjusting wheel is ensured to perform only rotation but not axial movement through the arrangement of the sliding block; the ob