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Lunt Solar ST 40/400 LS40T Ha B500 Solar Telescope
For compact solar observation, the Lunt Solar ST 40/400 LS40T Ha B500 Solar Telescope provides a 40mm H-alpha refractor with 400mm focal length and B500 blocking filtration.
- 40mm aperture operates at 656.3nm
- 400mm focal length uses f/10 optics
- B500 blocking filter diagonal included
- Tilting etalon provides wavelength adjustment
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Description
Compact visual solar monitoring is the focus of the Lunt Solar ST 40/400 LS40T Ha B500 Solar Telescope, a 40 mm Hydrogen-alpha refractor with a 400 mm focal length and listed f/10 optical ratio. Its tilting etalon module, B500 blocking-filter diagonal, helical focuser, tuning wheel, low-profile clamping block, GP-style dovetail, and compact aluminum chassis support dedicated H-alpha observation with the supplied narrow blocking-filter configuration.
The B500 blocking filter is an essential part of the supplied solar optical path and must remain correctly installed with the etalon for solar use, while the filter, diagonal, tuning module, focuser, and housing should be inspected before every session. Use only the complete original configuration, store the telescope in a dry protected location, and stop observing immediately if any component is damaged or incorrectly fitted.
Key Features of Lunt Solar ST 40/400 LS40T Ha B500 Solar Telescope
This compact Hydrogen-alpha solar telescope combines a 40 mm aperture with a 400 mm focal length, f/10 optical ratio, tilting etalon, B500 blocking filter, helical focuser, tuning wheel, low-profile mounting block, and GP-style dovetail interface for dedicated solar observation.
- 40 mm dedicated Hydrogen-alpha refractor
- 400 mm focal length with listed f/10 optical ratio
- Tilting etalon module
- B500 blocking-filter diagonal
- 1.25-inch helical focuser
- Integrated etalon tuning wheel
- Low-profile clamping block
- GP-style dovetail interface
Portable Visual H-Alpha Observation
The supplied application focuses on visual Hydrogen-alpha solar monitoring, chromospheric structures, prominences, and eclipse observation through the complete B500 and etalon system, while the blocking filter must remain installed, inspected, and undamaged throughout use and the optical path must not be altered or substituted with unrelated accessories.
Why Choose Lunt Solar ST 40/400 LS40T Ha B500 Solar Telescope
The LS40T B500 configuration is relevant when a compact dedicated solar telescope is needed for visual H-alpha observation, with a tilting etalon, narrow blocking-filter diagonal, helical focus control, integrated tuning, and a simple mounting interface that supports portable daytime solar sessions.
- Compact 40 mm Hydrogen-alpha solar telescope
- B500 blocking filter for the supplied visual setup
- Tilting etalon, focuser, tuning wheel, and mounting interface included
Lunt 5-Year Limited Warranty
The supplied product information lists a 5-year limited warranty for this solar telescope, and the applicable US warranty terms, etalon coverage, B500 blocking-filter coverage, focuser coverage, registration requirements, and authorized service process should be confirmed before purchase because the complete filter path is essential to correct and safe operation.
Lunt Solar ST 40/400 LS40T Ha B500 Solar Telescope Specs
| Brand | Lunt Solar Systems |
| Full Model Code | Lunt Solar Systems LS40T/B500 Dedicated Hydrogen-Alpha Solar Telescope (LS40T-B500) |
| Country of Origin | United States |
| Optical Design | Dedicated Hydrogen-Alpha Refractor (Single-Aperture Etalon System) |
| Aperture | 40 mm (1.57 inches) |
| Focal Length | 400 mm |
| Focal Ratio | f/10 |
| Optical Coatings | Fully Multi-Coated Optimized Solar Wavelength Refractive Coatings |
| Glass Material | Precision Laser-Polished Optical Substrates with B500 Blocking Filter Core |
| Secondary Mirror Obstruction | 0 mm (None) |
| Secondary Mirror Obstruction by Diameter | 0% |
| Secondary Mirror Obstruction by Area | 0% |
| Resolving Power | 2.90 Arcseconds (Dawes), 3.46 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | Daytime Solar Tracker Asset (Not Applicable for Night Starlight Scaling) |
| Highest Useful Magnification | 80x |
| Lowest Useful Magnification | 6x |
| Optical Tube Material | Premium CNC-Machined Aluminum Structural Chassis (White and Anodized Red Accent Finish) |
| Focuser Style & Mechanism | 1.25-inch Helical Focuser Assembly with Fine Precision Friction Adjustment Track |
| Mirror Lock Mechanism | No (Equipped with Integrated Tilting Etalon Chamber Tuning Wheel) |
| Optical Tube Dimensions | 80 mm x 370 mm |
| Optical Tube Weight | 1.20 kg (2.65 lbs) |
| Mount Attachment Type | Integrated Low-Profile Clamping Block with Standard 1/4-inch Thread and GP Dovetail Bar Interface |
| Finder Scope Specification | Optional Lunt Sol-Searcher Solar Finder Alignment Device Block |
| Included Accessories | LS40T Solar Telescope, Tilting Etalon Module, B500 Blocking Filter Diagonal (1.25-inch), Helical Focuser, Vixen/GP Dovetail Bar |
| Standard Warranty | 5-Year Limited Warranty |
| Application | Ultra-portable visual solar monitoring and promotional eclipse tracking, optimizing system cost with a narrow B500 filter optimized specifically for small-field eyepieces. |
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