LS50THa Single Stack

Lunt LS50THa B600 Blocking Filter & Pressure-Tuner


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SKU: 0551156 Category:

Lunt 50mm H-alpha Solar Telescope with B600 Blocking Filter and Pressure-Tuner

The Lunt 50mm H-alpha Solar Telescope from Lunt Solar Systems is a 50mm, unobstructed, pressure-tuned, dedicated Hydrogen-alpha telescope with a bandpass of <0.75 Angstroms.

True Doppler Tuning (Pressure Tuning) allows for a shift into and away from the user, adding a 3D-like component to the viewing experience. While it has minimal effect on proms due to their being at the edge of the disk, it does have an effect on filaments and active regions on the surface. While looking at a filament at the center of the Sun the user has the ability to Doppler shift from the base of the filament to the tip, following the filament through it’s structure toward you and away from you, allowing for enhanced visual and imaging capability for the observer as well as a research tool for the avid hobbyist. The pressure tuning system provides an order of magnitude more precision to the tuning of the desired features.

This version of the Lunt 50mm H-alpha Solar Telescope features the B600 blocking filter, the largest fitted to the 50 series making it ideal for solar imaging. H-alpha solar imaging is best done with a mono planetary camera. See the recomended items below.

Stock No: 0551156


  • A Narrow Band Hydrogen-alpha Dedicated System.
  • A refractor-based system with a 50 mm front objective.
  • An internal Etalon with a pressure tuner allows for <0.75 Angstrom bandpass.
  • The system includes the clamshell with threaded holes for mounting and dust caps.

Type: Single Interference Etalon
Tuning: Internal Pressure Tune (Doppler True Tuning)
Aperture: 50 mm
Focal Length: 350 mm
F Ratio: F7
Bandpass: <0.75 Angstroms @ 656 nm
Focuser: Helical Focuser
Blocking Filter: B600 Diagonal
Mounting: Integrated clamshell style with 1/4-20 tapped base
Color: Pearl White with Black and Red accents


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