Lunt LS50C 50mm Compact Double-Stack Filter

Lunt 50mm Compact Double-Stack Filter LS50C

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. 

Features:

• 50mm Compact Double-Stack Filter – Designed specifically for the Lunt LS50THa 50mm solar telescope series, with a compact, unobstructed optical design.

• Precision 0.4Å Tilt-Tuned Etalon – Features a second 0.4Å tilt-tuned etalon, individually verified using Lunt’s precision metrology equipment.

• ~0.35Å Combined Bandpass – Reduces the combined system bandpass to approximately 0.35Å with current LS50THa telescopes for enhanced chromospheric contrast and solar detail.

• Tool-Free Installation – Threads directly onto the front of the LS50THa OTA in seconds, requiring no tools or factory visit.

• Compact & Portable Design – Maintains the grab-and-go character of the LS50THa system and remains manageable on Vixen-compatible mounts or photo tripods.

What's Included:

✓ Lunt LS50C 50mm Compact Double-Stack Filter

✓ Aluminum Hard Case with Fitted Foam

✓ Instructional Manual

Specifications: