Double Stack Filter for 80mm & 100mm Universal Telescopes
Lunt
From $2,199.00
2 stores
In stock
The Lunt Double Stack Filter is an internal H-alpha etalon module that enhances solar observation on Lunt LS80MT and LS100MT Universal Telescopes by significantly narrowing the bandpass from less than 0.7 Angstroms to less than 0.5 Angstroms. This upgrade delivers dramatically improved contrast and resolution of solar surface details, revealing prominences, filaments, and active regions with exceptional clarity for both visual and imaging applications. Installation is user-friendly with no factory return required, and the module includes a pressure tuner for precision Doppler tuning to optimize your solar views.
Specifications
| Bandpass Reduction | From <0.7 to <0.5 Angstroms |
| User Installable | ✓ |
| Installation Type | Internal |
| Compatible Telescopes | Lunt LS80MT and LS100MT Universal Telescopes |
| Filter Type | Internal Double Stack H-Alpha Etalon Module |
| Compatible Apertures | 80 mm |
| Includes Pressure Tuner | ✓ |
| Model Number | SFPT (also known as DSII/SFPT) |
| Factory Return Required | false |
| Doppler Tuning | ✓ |
| Observation Type | Solar H-Alpha |