Lunt LS50C Compact Double-Stack Filter

Lunt LS50C Compact Double-Stack FilterLS50C Compact Double Stack Filter The double stack upgrade designed specifically for the Lunt LS50THa 50mm solar telescope series. Now with new generation etalons every unit individually tested on Lunt's precision metrology equipment. Every specification is verified, not estimated. The LS50C is a compact double stack filter made specifically for the Lunt LS50THa 50mm dedicated solar telescope series. It threads directly onto the front of the LS50THa

LS50C — Compact Double Stack Filter The double-stack upgrade designed specifically for the Lunt LS50THa 50mm solar telescope series.

Now with new-generation etalons — every unit individually tested on Lunt's precision metrology equipment. Every specification is verified, not estimated.

The LS50C is a compact double-stack filter made specifically for the Lunt LS50THa 50mm dedicated solar telescope series. It threads directly onto the front of the LS50THa OTA in seconds — no tools, no factory visit — adding a second 0.4Å tilt-tuned etalon to the optical path and reducing combined system bandpass to ~0.35Å when used with current LS50THa telescopes.

The compact form factor is the defining characteristic of the LS50C. It is designed to maintain the LS50THa's grab-and-go character — the total system with the DS filter in place remains compact and manageable on any Vixen-compatible mount or photo tripod. At ~0.35Å combined bandpass the chromospheric contrast improvement over single-stack is immediately and dramatically visible. Surface structure that single-stack views render as texture becomes resolved detail. Plage regions separate from the chromospheric background. Filaments show dark cores and complex multi-strand architecture. Prominences reveal internal threading from base to tip.

Note: A Lunt blocking filter is required for safe operation — the LS50C cannot be used without one.

Note on bandpass: Combined system bandpass of ~0.35Å is achieved when paired with current LS50THa telescopes. 

Specifications

• Model: LS50C
• Optical Aperture: 50mm compact — no central obstruction
• Tuning: Tilt-tuned
• Single Etalon Bandpass: 0.4Å — individually verified
• Combined System Bandpass: ~0.35Å with current LS50THa telescopes
• Installation: Threads directly onto LS50THa OTA front — no tools required
• Compatible With: LS50THa Standard, Enhanced, and Premium series
• Blocking Filter Required: Yes — sold separately (B600 recommended)
• Storage: Aluminium hard case with fitted foam