Lunt Front Mount 50mm Double Stack Solar Filter

Lunt Front Mount 50mm Double Stack Solar Filter - LS50FHa

LS50FHa — 50mm Front-Mount H-Alpha Solar Filter A 0.4Å tilt-tuned etalon for two purposes: double-stack upgrade for the Lunt LS60MT, or standalone H-alpha filter for compatible customer refractors.

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

The LS50FHa is a 50mm aperture front-mounted tilt-tuned H-alpha filter with a verified bandpass of 0.4Å. It serves two distinct purposes — as a double-stack etalon for the Lunt LS60MT Modular Telescope, or as a standalone H-alpha solar filter for a customer-supplied compatible refractor.

As a double-stack filter for the LS60MT: The LS50FHa mounts to the front of the LS60MT in night configuration, placing its 0.4Å tilt-tuned etalon in series with the LS60MT's internal 0.45Å pressure-tuned etalon. Combined system bandpass: <0.28Å. No factory visit required. The filter is easily removed for night-sky use.

As a standalone H-alpha filter for customer refractors: The LS50FHa retrofits a compatible customer-supplied ED refractor for daytime solar observation and is easily removed for night use. A Lunt blocking filter must be used at all times — this is a safety requirement. Select the correct blocking filter for your telescope and intended use:

• B600 — visual use on telescopes up to 540mm focal length

• B1200 — visual use up to 1,080mm / imaging up to 540mm focal length

• B1800 — visual use up to 1,620mm / imaging up to 1,080mm focal length

If you are looking for a complete standalone H-alpha solar filter package including a blocking filter and adapter, Lunt offers complete 40mm and 50mm filter packages that include both —see the LS40FHa and LS50C product listings at: luntsolarsystems.com/collections/front-mounted-etalon-systems

Features:

• 50mm Front-Mount Aperture – Provides a clear, unobstructed 50mm optical aperture for detailed H-alpha solar observation.

• Precision 0.4Å Tilt-Tuned Etalon – Individually verified for a 0.4Å bandpass using Lunt’s precision metrology equipment.

• Ultra-Narrow <0.28Å Double-Stack Bandpass – Combines with the LS60MT’s internal 0.45Å pressure-tuned etalon to deliver a <0.28Å combined system bandpass.

• Dual-Purpose Compatibility – Designed as a double-stack upgrade for the Lunt LS60MT or as a standalone H-alpha filter for compatible customer-supplied ED refractors.

• Easy Installation & Removal – Front-mount design requires no factory visit and can be quickly removed when switching the telescope back to night-sky use.

What's Included:

✓ Lunt Front Mount 50mm Double Stack Solar Filter

✓ Aluminum Hard Case with Fitted Foam

✓ Instructional Manual

Specifications: