Lunt 100 mm H-Alpha Etalon Filter

with Blocking Filters (LS100FHa)

• Preorder notice: estimated to ship ~6 months after checkout

• Turn your quality refractor into a daytime H-alpha powerhouse: 100 mm front-mounted etalon for dramatic prominences, filaments, and surface texture

• Single-stack bandpass <0.70 Å delivers high-contrast surface and limb detail; double-stack with a second LS100FHa to reach ~<0.50 Å (scope-dependent) for even finer structure

• Root-3, integrally tuned etalon with tilt tuning for precise on-band performance across changing conditions

• Removable daytime kit: take the filter off and the same refractor returns to night-sky duty—one telescope, two worlds

• Adapter included for refractors ≤102 mm; note your telescope in the order comments for a proper fit. For larger OTAs, contact Lunt for adapter options and pricing

• Bundle your blocking filter to match focal length and workflow (B600/B1200/B1800/B3400); imaging users typically choose the next larger size to accommodate back focus

• Built by Lunt Solar Systems for safety and performance—use only with a Lunt Blocking Filter to ensure warranted operation

• Field-ready protection: packed in an aluminum hard case with fitted foam; approx. 8 lb for stable front-end mounting

• Ideal for high-resolution imaging and discerning visual observers who want premium contrast and upgradeable performance

Specifications

• Model: LS100FHa front-mounted H-alpha etalon

• Optical Aperture: 100 mm

• Estimated Bandpass (single stack): <0.70 Å

• Double-Stack Option: Add a second LS100FHa for ~<0.50 Å (scope-dependent)

• Tuning: Tilt tuning

• Required Accessory: Lunt Blocking Filter (B600/B1200/B1800/B3400)

• Adapters: Included for refractors up to 102 mm; larger diameters available by request

• Storage: Aluminum finished hard case with fitted foam

• Weight: ~8 lb

• Preorder Lead Time: ~6 months from checkout (estimate)

What’s in the Box?

• Lunt LS100FHa 100 mm H-alpha Etalon Filter

• Adapter set for refractors up to 102 mm

• Aluminum hard case with fitted foam

• Selected Lunt Blocking Filter (B600 / B1200 / B1800 / B3400) — if purchased as a bundle; otherwise available separately