Aim at your target and use the main telescope focusing ring to bring the object into sharp focus.
The Hilger Watts Theodolite manual is a well-organized and comprehensive resource that provides detailed instructions on the operation, maintenance, and troubleshooting of the instrument. While it assumes some prior knowledge of surveying and Theodolite operation, it is an excellent resource for users who need to understand the instrument's capabilities and limitations.
Online communities such as The Surveying Forum or specific vintage machinery groups on Facebook and Reddit are excellent resources. Members frequently share digitized manual copies or provide step-by-step troubleshooting for specific model variations. hilger watts theodolite manual
Through the scratched glass of its heavy steel case, the looks more like a time machine than a surveyor’s tool. But to a young chain-man in the mid-1950s, it was the gold standard of precision—a device that could map the edge of the world if you knew how to listen to it.
The T2 is arguably the most famous Hilger Watts theodolite. It was a 1-arc-second instrument used for second-order triangulation. Aim at your target and use the main
Hilger & Watts optical theodolites are masterpieces of mid-20th-century precision engineering. Renowned for their robust construction and exceptionally clear optics, these instruments remain highly valued by surveyors, collectors, and instrument restorers worldwide.
[ Telescope Focus Ring ] | [ Eyepiece Focus ] ------ [ Optical Sight ] | [ Vertical Circle Housing ] | [ Circle Reading Eyepiece ] | [ Upper Tangent Screw ] --- [ Plate Bubble Level ] | [ Lower Tangent Screw ] | [ Tribrach Base ] | [ Levelling Footscrews ] Online communities such as The Surveying Forum or
If you need to order a replacement foot screw, bubble vial, or lens, you cannot simply email a modern supplier. You need the part numbers and exploded diagrams from the manual.
The manual states: “Never unscrew a lens cell. Dust on the internal circle glass must be ignored; do not attempt to access it. For external lenses, use camel hair brush only.”