The document applies for tripods with telescopic legs for geodetic instruments and it's equipment. It suppose to increase the functional value for geodetic instruments and guarantee the interchangeablility of the tripod of different manufactures.
DIN 18726:1996 history
2018DIN ISO 12858-2:2018 Optics and optical instruments - Ancillary devices for geodetic instruments - Part 2: Tripods (ISO 12858-2:1999 + Amd.1:2013)