... , DTM315B, DTM322A, DTM322B, DTM325A, DTM325B suits the measurement with target and prism.SPECIFICATION: ModelDTM312A,DTM312BDTM315A,DTM315BDTM322A,DTM322BDTM325A,DTM325BTelescope Length150mmMagnification30XImageErectShortest sighting dictance1.0mAdditive ...