Lunt Double Stack Filters

Lunt Double Stack Filters Give your solar views a serious contrast boost—double stacking tightens bandpass to ~<0.50 Å, so surface texture, filaments, and plages really pop Choose your match: LS50FHa (50 mm) for Lunt ED refractors, or LS60FHa (60 mm) for customer-supplied refractors (adapters may be required) No central obstruction designs maintain even illumination across the solar disk for crisp full-disk and close-up work Tilt-tuned etalons make it easy to dial features on-band, adding that dynamic, 3D-like feel to solar structure Day-to-night flexibility: front-mounted filters are easily removable, so your refractor goes right back to nighttime use Safety first: a Lunt Blocking Filter is required for operation—select the size that fits your focal length and workflow (larger BF recommended for imaging to accommodate back focus) Ships protected and travel-ready in a fitted aluminum case—reliable alignment, session after session Built by Lunt Solar Systems for on-band reliability and a seamless fit with Lunt platforms Specifications LS50FHa (for Lunt ED refractors) Aperture: 50 mm (no central obstruction) Bandpass (single): <0.70 Å; effective DS system: ~<0.50 Å Tuning: Tilt (integrally tuned) Intended Telescopes: Lunt ED80 (f/7), ED102 (f/7) Storage/Weight: Aluminum hard case with fitted foam; ~2 lb (~1 kg) Blocking Filter Guidance: B600 visual; B1200/B1800 visual & imaging (larger BF preferred for imaging) LS60FHa (for customer-supplied refractors) Aperture: 60 mm (no central obstruction) Bandpass (single): <0.70 Å; effective DS system: ~<0.50 Å (scope-dependent) Tuning: Tilt (integrally tuned) Focal Length Guidance (choose BF by FL): B600 up to 540 mm (1.25" or 2" diagonal) B1200 up to 1080 mm (1.25" or 2" diagonal) B1800 up to 1620 mm (1.25" or 2" diagonal) B3400 up to 3060 mm (2" straight-through tube) Storage/Weight: Aluminum hard case with fitted foam; ~3 lb (~1.5 kg) Note: Adapters may be required to retrofit your refractor (sold separately) General Use Case: Visual and imaging H-alpha double stacking for higher contrast and finer detail Operation: Front-mounted, removable filters for daytime use; easy swap back to night observing Requirement: Always use with a Lunt Blocking Filter matched to your system What’s in the Box? Lunt Double Stack Filter of your choice (LS50FHa or LS60FHa) Aluminum finished hard case with fitted foam Basic documentation and usage guidance Blocking filter and any required adapter plates are sold separately. Select the appropriate Lunt Blocking Filter (B600/B1200/B1800/B3400 as applicable) for safe operation and full-field coverage.