Schüler double prism
19.01.2021
The double prism according to Schüler is preinstalled on the HORIZON ULTRA. It is mounted in front of the shadow glasses in horizon direction. The double prism can only be used in combination with a full-view mirror. Retrofitting with other models is only possible with a simplified form of the prism level (see below).
The lens is shaped in such a way that it cuts out a vertical area in the middle of the horizon viewing beam.
This provides two advantages for sun observations:
- The sun's reflections on the water surface are faded out and there are no measurement errors caused by glare.
- An inclination of the sextant can be clearly recognised as a step in the horizon.
Full-view without double prism
Full-view with double prism
(no inclination)
Full-view with double prism
(with inclination)
For retrofitting to other models, we have a simplified form of the prism level available (Link to product). With the help of the prism level for retrofitting, the inclination of the sextant can be recognised as a step in the horizon.
