{"id":109391,"date":"2026-07-16T16:56:13","date_gmt":"2026-07-16T14:56:13","guid":{"rendered":"https:\/\/www.telescoop.nl\/lunt-ls130mt-dsii-double-stack-module\/"},"modified":"2026-08-19T17:19:30","modified_gmt":"2026-08-19T15:19:30","slug":"lunt-ls130mt-dsii-double-stack-module","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/lunt-ls130mt-dsii-double-stack-module\/","title":{"rendered":"Lunt LS130MT DSII Double-Stack Module"},"content":{"rendered":"

From <0.7 to <0.5 Angstroms<\/h2>\n\n\n\n

A single etalon transmits a band of about 0.7 Angstroms. That is narrow enough to see prominences and coarse structures, but the residual continuum light that leaks through reduces the contrast on the surface<\/em>. The DSII double-stack module<\/strong> connect a second etalon in series and bring the bandwidth back to less than 0.5 Angstrom<\/strong>.<\/p>\n\n\n\n

\"Lunt<\/figure>
\"Lunt<\/figure>
\"Lunt<\/figure><\/figure>\n\n\n\n

The effect is dramatic on precisely that which you see least well with a single system: filaments, active regions, and fine surface structure<\/strong> The prominences on the edge change less; they were already clearly visible.<\/p>\n\n\n\n

In the back, not the front<\/h3>\n\n\n\n

Unlike external double-stack filters that you attach in front of the lens, the DSII inside the telescope<\/strong>. This means no extra weight on the front, no balance issues, and a reticle that is protected from dust and moisture. The module, just like the telescope itself, is adjusted via the Pressure-Tuner system.<\/p>\n\n\n\n

Only suitable for the LS130MT.<\/strong> This module does not fit other Lunt telescopes.<\/p>\n\n\n\n

Specifications<\/h2>\n\n\n\n