Low cost all-round fullview sextant for sun observations as well as twilight observations. Technical details: - Binoculair: 3,5 x 40 - Range: -5° to 130°- Exactness: +/- 20'. Seawater resistant silver coating by protective varnish Scratch proof full vieuw coating Full view and traditional mirror are held within a solid frame to protect them against impact and de-adjustment.