... DTM312A, DTM312B, DTM315A, DTM315B, DTM322A, DTM322B, DTM325A, DTM325B suits the measurement with target and prism. Angle accuracies are 2", 3 ... sighting dictance1.0mAdditive constant0Objective lens apertureφ48Resolving power3.75Field of view1°3026m/1000mStadia proportion100Reticle illuminationProvidedAngle measurement sectionHorizontal angle panelPhotoelectric ...