The 4x40 prism telescope is the standard telescope for sextants.
It has a high luminous intensity for twilight observations and a lower magnification for a steady image. It also has sufficient magnification for terrestrial horizontal angle measurements.
The telescope can be easily attached to the sextant and exchanged by a clamping screw. As a second telescope it can be safely stored in our wooden case with the help of an optional mounting block.
|Field of vision:||130/1000m (or 7,5°)|
|Exit pupil:||10 mm|
|Geometric luminous intensity:||100|